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| version 1.28, 2001/03/24 15:58:00 | version 1.183, 2004/04/05 13:37:06 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: commonly functions. | Parser: commonly functions. |
| Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com) | Copyright(c) 2001-2004 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | |
| Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf) | |
| $Id$ | |
| */ | */ |
| #include "pa_config_includes.h" | static const char * const IDENT_COMMON_C="$Date$"; |
| #include <fcntl.h> | |
| #include <sys/stat.h> | |
| #include <io.h> | |
| #include <stdio.h> | |
| #include <errno.h> | |
| #include "pa_common.h" | #include "pa_common.h" |
| #include "pa_types.h" | |
| #include "pa_exception.h" | #include "pa_exception.h" |
| #include "pa_pool.h" | |
| #include "pa_globals.h" | |
| #include "pa_value.h" | |
| #include "pa_hash.h" | #include "pa_hash.h" |
| #include "pa_string.h" | #include "pa_globals.h" |
| #include "pa_request_charsets.h" | |
| #include "pa_charsets.h" | |
| #if _MSC_VER | #define PA_HTTP |
| int __vsnprintf(char *b, size_t s, const char *f, va_list l) { | #ifdef PA_HTTP |
| int r=_vsnprintf(b, --s, f, l); | #include "pa_vstring.h" |
| b[s]=0; | #include "pa_vint.h" |
| return r; | #include "pa_vhash.h" |
| #include "pa_vtable.h" | |
| #ifdef CYGWIN | |
| #define _GNU_H_WINDOWS32_SOCKETS | |
| // for PASCAL | |
| #include <windows.h> | |
| // SOCKET | |
| typedef u_int SOCKET; | |
| int PASCAL closesocket(SOCKET); | |
| #else | |
| # if defined(WIN32) | |
| # include <windows.h> | |
| # else | |
| # define closesocket close | |
| # endif | |
| #endif | |
| #else | |
| # if defined(WIN32) | |
| # include <windows.h> | |
| # endif | |
| #endif | |
| // some maybe-undefined constants | |
| #ifndef _O_TEXT | |
| # define _O_TEXT 0 | |
| #endif | |
| #ifndef _O_BINARY | |
| # define _O_BINARY 0 | |
| #endif | |
| #ifdef HAVE_FTRUNCATE | |
| # define PA_O_TRUNC 0 | |
| #else | |
| # ifdef _O_TRUNC | |
| # define PA_O_TRUNC _O_TRUNC | |
| # else | |
| # error you must have either ftruncate function or _O_TRUNC bit declared | |
| # endif | |
| #endif | |
| # ifndef INADDR_NONE | |
| # define INADDR_NONE ((ulong) -1) | |
| # endif | |
| // defines for globals | |
| #define FILE_STATUS_NAME "status" | |
| // globals | |
| const String file_status_name(FILE_STATUS_NAME); | |
| // defines | |
| #define HTTP_METHOD_NAME "method" | |
| #define HTTP_FORM_NAME "form" | |
| #define HTTP_BODY_NAME "body" | |
| #define HTTP_TIMEOUT_NAME "timeout" | |
| #define HTTP_HEADERS_NAME "headers" | |
| #define HTTP_ANY_STATUS_NAME "any-status" | |
| #define HTTP_CHARSET_NAME "charset" | |
| #define HTTP_TABLES_NAME "tables" | |
| #define HTTP_USER "user" | |
| #define HTTP_PASSWORD "password" | |
| // defines | |
| #define DEFAULT_USER_AGENT "parser3" | |
| // functions | |
| void fix_line_breaks(char *str, size_t& length) { | |
| //_asm int 3; | |
| const char* const eob=str+length; | |
| char* dest=str; | |
| // fix DOS: \r\n -> \n | |
| // fix Macintosh: \r -> \n | |
| char* bol=str; | |
| while(char* eol=(char*)memchr(bol, '\r', eob -bol)) { | |
| size_t len=eol-bol; | |
| if(dest!=bol) | |
| memcpy(dest, bol, len); | |
| dest+=len; | |
| *dest++='\n'; | |
| if(&eol[1]<eob && eol[1]=='\n') { // \r, \n = DOS | |
| bol=eol+2; | |
| length--; | |
| } else // \r, not \n = Macintosh | |
| bol=eol+1; | |
| } | |
| // last piece without \r | |
| if(dest!=bol) | |
| memcpy(dest, bol, eob-bol); | |
| str[length]=0; // terminating | |
| } | } |
| int __snprintf(char *b, size_t s, const char *f, ...) { | |
| va_list l; | char* file_read_text(Request_charsets& charsets, |
| va_start(l, f); | const String& file_spec, |
| int r=__vsnprintf(b, s, f, l); | bool fail_on_read_problem, |
| va_end(l); | HashStringValue* params/*, HashStringValue* * out_fields*/) { |
| return r; | File_read_result file= |
| file_read(charsets, file_spec, true, params, fail_on_read_problem); | |
| return file.success?file.str:0; | |
| } | } |
| //http request stuff | |
| #ifdef PA_HTTP | |
| #undef CRLF | |
| #define CRLF "\r\n" | |
| static bool set_addr(struct sockaddr_in *addr, const char* host, const short port){ | |
| memset(addr, 0, sizeof(*addr)); | |
| addr->sin_family=AF_INET; | |
| addr->sin_port=htons(port); | |
| if(host) { | |
| ulong packed_ip=inet_addr(host); | |
| struct hostent *hostIP = packed_ip==INADDR_NONE? | |
| gethostbyname(host) | |
| : gethostbyaddr((char *)&packed_ip, sizeof(packed_ip), AF_INET); | |
| if(hostIP) | |
| memcpy(&addr->sin_addr, hostIP->h_addr, hostIP->h_length); | |
| else | |
| return false; | |
| } else | |
| addr->sin_addr.s_addr=INADDR_ANY; | |
| return true; | |
| } | |
| static int http_read_response(char*& response, size_t& response_size, int sock, bool fail_on_status_ne_200){ | |
| response=(char*)pa_malloc_atomic(1/*terminator*/); // setting memory block type | |
| response[(response_size=0)]=0; | |
| int result=0; | |
| char* EOLat=0; | |
| while(true) { | |
| char buf[MAX_STRING*10]; | |
| ssize_t received_size=recv(sock, buf, sizeof(buf), 0); | |
| if(received_size<=0) | |
| break; | |
| response=(char*)pa_realloc(response, response_size+received_size+1/*terminator*/); | |
| memcpy(response+response_size, buf, received_size); | |
| response_size+=received_size; | |
| response[response_size]=0; | |
| if(!result && (EOLat=strstr(response, CRLF))) { // checking status in first response | |
| const String status_line(pa_strdup(response, EOLat-response)); | |
| ArrayString astatus; | |
| size_t pos_after=0; | |
| status_line.split(astatus, pos_after, " "); | |
| const String& status_code=*astatus.get(astatus.count()>1?1:0); | |
| result=status_code.as_int(); | |
| if(fail_on_status_ne_200 && result!=200) | |
| throw Exception("http.status", | |
| &status_code, | |
| "invalid HTTP response status"); | |
| } | |
| } | |
| if(result) | |
| return result; | |
| else | |
| throw Exception("http.response", | |
| 0, | |
| "bad response from host - no status found (size=%u)", response_size); | |
| } | |
| /* ********************** request *************************** */ | |
| #if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP) | |
| # define PA_USE_ALARM | |
| #endif | #endif |
| #ifdef PA_USE_ALARM | |
| static sigjmp_buf timeout_env; | |
| static void timeout_handler(int sig){ | |
| siglongjmp(timeout_env, 1); | |
| } | |
| #endif | |
| char *file_read_text(Pool& pool, const String& file_spec, bool fail_on_read_problem) { | static int http_request(char*& response, size_t& response_size, |
| int f; | const char* host, int port, |
| struct stat finfo; | const char* request, |
| char *fname=file_spec.cstr(); | int |
| if(!stat(fname,&finfo) &&(f=open(fname,O_RDONLY | #ifdef PA_USE_ALARM |
| #ifdef WIN32 | timeout |
| |O_TEXT | #endif |
| , | |
| bool fail_on_status_ne_200) { | |
| if(!host) | |
| throw Exception("http.host", | |
| 0, | |
| "zero hostname"); //never | |
| #ifdef PA_USE_ALARM | |
| signal(SIGALRM, timeout_handler); | |
| #endif | |
| int sock=-1; | |
| #ifdef PA_USE_ALARM | |
| if(sigsetjmp(timeout_env, 1)) { | |
| // stupid gcc [2.95.4] generated bad code | |
| // which failed to handle sigsetjmp+throw: crashed inside of pre-throw code. | |
| // rewritten simplier [though duplicating closesocket code] | |
| if(sock>=0) | |
| closesocket(sock); | |
| throw Exception("http.timeout", | |
| origin_string, | |
| "timeout occured while retrieving document"); | |
| return 0; // never | |
| } else { | |
| alarm(timeout); | |
| #endif | |
| try { | |
| int result; | |
| struct sockaddr_in dest; | |
| if(!set_addr(&dest, host, port)) | |
| throw Exception("http.host", | |
| 0, | |
| "can not resolve hostname \"%s\"", host); | |
| if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/))<0) | |
| throw Exception("http.connect", | |
| 0, | |
| "can not make socket: %s (%d)", strerror(errno), errno); | |
| if(connect(sock, (struct sockaddr *)&dest, sizeof(dest))) | |
| throw Exception("http.connect", | |
| 0, | |
| "can not connect to host \"%s\": %s (%d)", host, strerror(errno), errno); | |
| size_t request_size=strlen(request); | |
| if(send(sock, request, request_size, 0)!=(ssize_t)request_size) | |
| throw Exception("http.connect", | |
| 0, | |
| "error sending request: %s (%d)", strerror(errno), errno); | |
| result=http_read_response(response, response_size, sock, fail_on_status_ne_200); | |
| closesocket(sock); | |
| #ifdef PA_USE_ALARM | |
| alarm(0); | |
| #endif | |
| return result; | |
| } catch(...) { | |
| #ifdef PA_USE_ALARM | |
| alarm(0); | |
| #endif | |
| if(sock>=0) | |
| closesocket(sock); | |
| rethrow; | |
| } | |
| #ifdef PA_USE_ALARM | |
| } | |
| #endif | #endif |
| ))>=0) { | |
| /*if(exclusive) | |
| flock(f, LOCK_EX);*/ | |
| char *result=(char *)pool.malloc(finfo.st_size+1); | |
| int read_size=read(f,result,finfo.st_size); | |
| if(read_size>=0 && read_size<=finfo.st_size) | |
| result[read_size]='\0'; | |
| /*if(exclusive) | |
| flock(f, LOCK_UN);*/ | |
| close(f); | |
| return result;//prepare_config(result, remove_empty_lines); | |
| } | |
| if(fail_on_read_problem) | |
| PTHROW(0, 0, | |
| &file_spec, | |
| "read %s (#%d)", strerror(errno), errno); | |
| return 0; | |
| } | } |
| void file_write(Pool& pool, | #ifndef DOXYGEN |
| const String& file_spec, | struct Http_pass_header_info { |
| const char *data, size_t size, | Request_charsets* charsets; |
| bool as_text/*, | String* request; |
| bool exclusive*/) { | bool user_agent_specified; |
| char *fname=file_spec.cstr(); | }; |
| #endif | |
| static void http_pass_header(HashStringValue::key_type key, | |
| HashStringValue::value_type value, | |
| Http_pass_header_info *info) { | |
| *info->request <<key<<": " | |
| << attributed_meaning_to_string(*value, String::L_HTTP_HEADER, false) | |
| << CRLF; | |
| if(String(key, String::L_TAINTED).change_case(info->charsets->source(), String::CC_UPPER)=="USER-AGENT") | |
| info->user_agent_specified=true; | |
| } | |
| static Charset* detect_charset(Charset& source_charset, const String& content_type_value) { | |
| const String::Body CONTENT_TYPE_VALUE= | |
| content_type_value.change_case(source_charset, String::CC_UPPER); | |
| // content-type: xxx/xxx; source_charset=WE-NEED-THIS | |
| // content-type: xxx/xxx; source_charset="WE-NEED-THIS" | |
| // content-type: xxx/xxx; source_charset="WE-NEED-THIS"; | |
| size_t before_charseteq_pos=CONTENT_TYPE_VALUE.pos("CHARSET="); | |
| if(before_charseteq_pos!=STRING_NOT_FOUND) { | |
| size_t charset_begin=before_charseteq_pos+8/*CHARSET="*/; | |
| size_t open_quote_pos=CONTENT_TYPE_VALUE.pos('"', charset_begin); | |
| bool quoted=open_quote_pos==charset_begin; | |
| if(quoted) | |
| charset_begin++; // skip opening '"' | |
| size_t charset_end=CONTENT_TYPE_VALUE.length(); | |
| if(quoted) { | |
| size_t close_quote_pos=CONTENT_TYPE_VALUE.pos('"', charset_begin); | |
| if(close_quote_pos!=STRING_NOT_FOUND) | |
| charset_end=close_quote_pos; | |
| } else { | |
| size_t delim_pos=CONTENT_TYPE_VALUE.pos(';', charset_begin); | |
| if(delim_pos!=STRING_NOT_FOUND) | |
| charset_end=delim_pos; | |
| } | |
| const String::Body CHARSET_NAME_BODY= | |
| CONTENT_TYPE_VALUE.mid(charset_begin, charset_end); | |
| return &charsets.get(CHARSET_NAME_BODY); | |
| } | |
| return 0; | |
| } | |
| static const String* basic_authorization_field(const char* user, const char* pass) { | |
| if(!user&& !pass) | |
| return 0; | |
| String combined; | |
| if(user) | |
| combined<<user; | |
| combined<<":"; | |
| if(pass) | |
| combined<<pass; | |
| String* result=new String("Basic "); *result<<pa_base64(combined.cstr(), combined.length()); | |
| return result; | |
| } | |
| static void form_string_value2string( | |
| HashStringValue::key_type key, | |
| const String& value, | |
| String& result) | |
| { | |
| result << String(key, String::L_TAINTED) << "="; | |
| result.append(value, String::L_URI, true); | |
| result<< "&"; | |
| } | |
| #ifndef DOXYGEN | |
| struct Form_table_value2string_info { | |
| HashStringValue::key_type key; | |
| String& result; | |
| Form_table_value2string_info(HashStringValue::key_type akey, String& aresult): | |
| key(akey), result(aresult) {} | |
| }; | |
| #endif | |
| static void form_table_value2string(Table::element_type row, Form_table_value2string_info* info) { | |
| form_string_value2string(info->key, *row->get(0), info->result); | |
| } | |
| static void form_value2string( | |
| HashStringValue::key_type key, | |
| HashStringValue::value_type value, | |
| String* result) | |
| { | |
| if(const String* svalue=value->get_string()) | |
| form_string_value2string(key, *svalue, *result); | |
| else if(Table* tvalue=value->get_table()) { | |
| Form_table_value2string_info info(key, *result); | |
| tvalue->for_each(form_table_value2string, &info); | |
| } else | |
| throw Exception(0, | |
| new String(key, String::L_TAINTED), | |
| "is %s, "HTTP_FORM_NAME" option value must either string or table", value->type()); | |
| } | |
| static const char* form2string(HashStringValue& form) { | |
| String string; | |
| form.for_each(form_value2string, &string); | |
| return string.cstr(String::L_UNSPECIFIED); | |
| } | |
| #ifndef DOXYGEN | |
| struct File_read_http_result { | |
| char *str; size_t length; | |
| HashStringValue* headers; | |
| }; | |
| #endif | |
| /// @todo build .cookies field. use ^file.tables.SET-COOKIES.menu{ for now | |
| static File_read_http_result file_read_http(Request_charsets& charsets, | |
| const String& file_spec, | |
| bool as_text, | |
| HashStringValue *options=0) { | |
| File_read_http_result result; | |
| char host[MAX_STRING]; | |
| const char* uri; | |
| int port; | |
| const char* method="GET"; bool method_is_get; | |
| HashStringValue* form=0; | |
| const char* body_cstr=0; | |
| int timeout=2; | |
| bool fail_on_status_ne_200=true; | |
| Value* vheaders=0; | |
| Charset *asked_remote_charset=0; | |
| const char* user_cstr=0; | |
| const char* password_cstr=0; | |
| if(options) { | |
| int valid_options=0; | |
| if(Value* vmethod=options->get(HTTP_METHOD_NAME)) { | |
| valid_options++; | |
| method=vmethod->as_string().cstr(); | |
| } | |
| if(Value* vform=options->get(HTTP_FORM_NAME)) { | |
| valid_options++; | |
| form=vform->get_hash(); | |
| } | |
| if(Value* vbody=options->get(HTTP_BODY_NAME)) { | |
| valid_options++; | |
| body_cstr=vbody->as_string().cstr(String::L_UNSPECIFIED); | |
| } | |
| if(Value* vtimeout=options->get(HTTP_TIMEOUT_NAME)) { | |
| valid_options++; | |
| timeout=vtimeout->as_int(); | |
| } | |
| if((vheaders=options->get(HTTP_HEADERS_NAME))) { | |
| valid_options++; | |
| } | |
| if(Value* vany_status=options->get(HTTP_ANY_STATUS_NAME)) { | |
| valid_options++; | |
| fail_on_status_ne_200=!vany_status->as_bool(); | |
| } | |
| if(Value* vcharset_name=options->get(HTTP_CHARSET_NAME)) { | |
| valid_options++; | |
| asked_remote_charset=&::charsets.get(vcharset_name->as_string(). | |
| change_case(charsets.source(), String::CC_UPPER)); | |
| } | |
| if(Value* vuser=options->get(HTTP_USER)) { | |
| valid_options++; | |
| user_cstr=vuser->as_string().cstr(); | |
| } | |
| if(Value* vpassword=options->get(HTTP_PASSWORD)) { | |
| valid_options++; | |
| password_cstr=vpassword->as_string().cstr(); | |
| } | |
| if(valid_options!=options->count()) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "invalid option passed"); | |
| } | |
| if(!asked_remote_charset) // defaulting to $request:charset | |
| asked_remote_charset=&charsets.source(); | |
| method_is_get=strcmp(method, "GET")==0; | |
| if(method_is_get && body_cstr) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "you can not use $."HTTP_BODY_NAME" option with method GET"); | |
| //preparing request | |
| String& connect_string=*new String; | |
| // not in ^sql{... L_SQL ...} spirit, but closer to ^file::load one | |
| connect_string.append(file_spec, String::L_URI); // tainted pieces -> URI pieces | |
| String request_head_and_body; | |
| { | |
| // influence URLencoding of tainted pieces to String::L_URI lang | |
| Temp_client_charset temp(charsets, *asked_remote_charset); | |
| const char* connect_string_cstr=connect_string.cstr(String::L_UNSPECIFIED); | |
| const char* current=connect_string_cstr; | |
| if(strncmp(current, "http://", 7)!=0) | |
| throw Exception(0, | |
| &connect_string, | |
| "does not start with http://"); //never | |
| current+=7; | |
| strncpy(host, current, sizeof(host)-1); host[sizeof(host)-1]=0; | |
| char* host_uri=lsplit(host, '/'); | |
| uri=host_uri?current+(host_uri-1-host):"/"; | |
| char* port_cstr=lsplit(host, ':'); | |
| char* error_pos=0; | |
| port=port_cstr?strtol(port_cstr, &error_pos, 0):80; | |
| if(strchr(uri, '?') && form) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "use either uri with ?params or $."HTTP_FORM_NAME" option"); | |
| //making request head | |
| String head; | |
| head << method; | |
| head << " " << uri; | |
| if(form) | |
| if(method_is_get) | |
| head << "?" << form2string(*form); | |
| head <<" HTTP/1.0" CRLF | |
| "host: "<< host << CRLF; | |
| if(form && !method_is_get) { | |
| head << "content-type: application/x-www-form-urlencoded" CRLF; | |
| body_cstr = form2string(*form); | |
| } | |
| // http://www.ietf.org/rfc/rfc2617.txt | |
| if(const String* authorization_field_value=basic_authorization_field(user_cstr, password_cstr)) | |
| head<<"authorization: "<<*authorization_field_value<<CRLF; | |
| bool user_agent_specified=false; | |
| if(vheaders && !vheaders->is_string()) { // allow empty | |
| if(HashStringValue *headers=vheaders->get_hash()) { | |
| Http_pass_header_info info={&charsets, &head, false}; | |
| headers->for_each(http_pass_header, &info); | |
| user_agent_specified=info.user_agent_specified; | |
| } else | |
| throw Exception("parser.runtime", | |
| &connect_string, | |
| "headers param must be hash"); | |
| }; | |
| if(!user_agent_specified) // defaulting | |
| head << "user-agent: " DEFAULT_USER_AGENT CRLF; | |
| if(body_cstr) { | |
| // recode those pieces which are not in String::L_URI lang | |
| // [those violating HTTP standard, but widly used] | |
| body_cstr=Charset::transcode( | |
| String::C(body_cstr, strlen(body_cstr)), | |
| charsets.source(), | |
| *asked_remote_charset); | |
| head << "content-length: " << format(strlen(body_cstr), "%u") << CRLF; | |
| } | |
| const char* head_cstr=head.cstr(String::L_UNSPECIFIED); | |
| // recode those pieces which are not in String::L_URI lang | |
| // [those violating HTTP standard, but widly used] | |
| head_cstr=Charset::transcode( | |
| String::C(head_cstr, strlen(head_cstr)), | |
| charsets.source(), | |
| *asked_remote_charset); | |
| // head + end of header | |
| request_head_and_body << head_cstr << CRLF; | |
| // body | |
| if(body_cstr) | |
| request_head_and_body << body_cstr; | |
| } | |
| //sending request | |
| char* response; | |
| size_t response_size; | |
| int status_code=http_request(response, response_size, | |
| host, port, request_head_and_body.cstr(), | |
| timeout, fail_on_status_ne_200); | |
| //processing results | |
| char* raw_body; size_t raw_body_size; | |
| char* headers_end_at=strstr(response, CRLF CRLF /*change '4' below along!*/); | |
| if(headers_end_at) { | |
| raw_body=headers_end_at+4; | |
| raw_body_size=response_size-(raw_body-response); | |
| } else | |
| throw Exception("http.response", | |
| &connect_string, | |
| "bad response from host - no headers found"); | |
| *headers_end_at=0; | |
| const String header_block(response, headers_end_at-response, true); | |
| ArrayString aheaders; | |
| result.headers=new HashStringValue; | |
| VHash* vtables=new VHash; | |
| result.headers->put(HTTP_TABLES_NAME, vtables); | |
| HashStringValue& tables=vtables->hash(); | |
| size_t pos_after=0; | |
| header_block.split(aheaders, pos_after, CRLF); | |
| //processing headers | |
| size_t aheaders_count=aheaders.count(); | |
| Charset* real_remote_charset=0; // undetected, yet | |
| for(size_t i=1; i<aheaders_count; i++) { | |
| const String& line=*aheaders.get(i); | |
| size_t pos=line.pos(": ", 2); | |
| if(pos==STRING_NOT_FOUND || pos<1) | |
| throw Exception("http.response", | |
| &connect_string, | |
| "bad response from host - bad header \"%s\"", line.cstr()); | |
| const String::Body HEADER_NAME= | |
| line.mid(0, pos).change_case(charsets.source(), String::CC_UPPER); | |
| const String& header_value=line.mid(pos+2, line.length()); | |
| if(HEADER_NAME=="CONTENT-TYPE") | |
| real_remote_charset=detect_charset(charsets.source(), header_value); | |
| // tables | |
| { | |
| Value *valready=(Value *)tables.get(HEADER_NAME); | |
| bool existed=valready!=0; | |
| Table *table; | |
| if(existed) { | |
| // second+ appearence | |
| table=valready->get_table(); | |
| } else { | |
| // first appearence | |
| Table::columns_type columns =new ArrayString(1); | |
| *columns+=new String("value"); | |
| table=new Table(columns); | |
| } | |
| // this string becomes next row | |
| ArrayString& row=*new ArrayString(1); | |
| row+=&header_value; | |
| *table+=&row; | |
| // not existed before? add it | |
| if(!existed) | |
| tables.put(HEADER_NAME, new VTable(table)); | |
| } | |
| result.headers->put(HEADER_NAME, new VString(header_value)); | |
| } | |
| // defaulting to used-asked charset [it's never empty!] | |
| if(!real_remote_charset) | |
| real_remote_charset=asked_remote_charset; | |
| // output response | |
| String::C real_body=String::C(raw_body, raw_body_size); | |
| if(as_text && raw_body_size) // must be checked because transcode returns CONST string in case length==0, which contradicts hacking few lines below | |
| real_body=Charset::transcode(real_body, *real_remote_charset, charsets.source()); | |
| result.str=const_cast<char *>(real_body.str); // hacking a little | |
| result.length=real_body.length; | |
| result.headers->put(file_status_name, new VInt(status_code)); | |
| return result; | |
| } | |
| #endif | |
| #ifndef DOXYGEN | |
| struct File_read_action_info { | |
| char **data; size_t *data_size; | |
| }; | |
| #endif | |
| static void file_read_action( | |
| struct stat& finfo, | |
| int f, | |
| const String& file_spec, const char* /*fname*/, bool as_text, | |
| void *context) { | |
| File_read_action_info& info=*static_cast<File_read_action_info *>(context); | |
| if(size_t to_read_size=(size_t)finfo.st_size) { | |
| *info.data=new(PointerFreeGC) char[to_read_size+(as_text?1:0)]; | |
| *info.data_size=(size_t)read(f, *info.data, to_read_size); | |
| if(ssize_t(*info.data_size)<0 || *info.data_size>to_read_size) | |
| throw Exception(0, | |
| &file_spec, | |
| "read failed: actually read %u bytes count not in [0..%u] valid range", | |
| *info.data_size, to_read_size); | |
| } else { // empty file | |
| if(as_text) { | |
| *info.data=new(PointerFreeGC) char[1]; | |
| *(char*)(*info.data)=0; | |
| } else | |
| *info.data=0; | |
| *info.data_size=0; | |
| return; | |
| } | |
| } | |
| File_read_result file_read(Request_charsets& charsets, const String& file_spec, | |
| bool as_text, HashStringValue *params, | |
| bool fail_on_read_problem) { | |
| File_read_result result={false, 0, 0, 0}; | |
| #ifdef PA_HTTP | |
| if(file_spec.starts_with("http://")) { | |
| // fail on read problem | |
| File_read_http_result http=file_read_http(charsets, file_spec, as_text, params); | |
| result.success=true; | |
| result.str=http.str; | |
| result.length=http.length; | |
| result.headers=http.headers; | |
| } else { | |
| #endif | |
| if(params && params->count()) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "invalid option passed"); | |
| File_read_action_info info={&result.str, &result.length}; | |
| result.success=file_read_action_under_lock(file_spec, | |
| "read", file_read_action, &info, | |
| as_text, fail_on_read_problem); | |
| #ifdef PA_HTTP | |
| } | |
| #endif | |
| if(result.success && as_text) { | |
| // UTF-8 signature: EF BB BF | |
| if(result.length>=3) { | |
| char *in=(char *)result.str; | |
| if(strncmp(in, "\xEF\xBB\xBF", 3)==0) { | |
| result.str=in+3; result.length-=3;// skip prefix | |
| } | |
| } | |
| fix_line_breaks((char *)(result.str), result.length); | |
| } | |
| return result; | |
| } | |
| #ifdef PA_SAFE_MODE | |
| void check_safe_mode(struct stat finfo, const String& file_spec, const char* fname) { | |
| if(finfo.st_uid/*foreign?*/!=geteuid() | |
| && finfo.st_gid/*foreign?*/!=getegid()) | |
| throw Exception("parser.runtime", | |
| &file_spec, | |
| "parser is in safe mode: " | |
| "reading files of foreign group and user disabled " | |
| "[recompile parser with --disable-safe-mode configure option], " | |
| "actual filename '%s', " | |
| "fuid(%d)!=euid(%d) or fgid(%d)!=egid(%d)", | |
| fname, | |
| finfo.st_uid, geteuid(), | |
| finfo.st_gid, getegid()); | |
| } | |
| #endif | |
| bool file_read_action_under_lock(const String& file_spec, | |
| const char* action_name, File_read_action action, void *context, | |
| bool as_text, | |
| bool fail_on_read_problem) { | |
| const char* fname=file_spec.cstr(String::L_FILE_SPEC); | |
| int f; | int f; |
| if(access(fname, F_OK)!=0) {/*no*/ | |
| if((f=open(fname,O_WRONLY|O_CREAT|_O_BINARY,0666))>0) | // first open, next stat: |
| close(f); | // directory update of NTFS hard links performed on open. |
| // ex: | |
| // a.html:^test[] and b.html hardlink to a.html | |
| // user inserts ! before ^test in a.html | |
| // directory entry of b.html in NTFS not updated at once, | |
| // they delay update till open, so we would receive "!^test[" string | |
| // if would do stat, next open. | |
| // later: it seems, even this does not help sometimes | |
| if((f=open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0) { | |
| try { | |
| if(pa_lock_shared_blocking(f)!=0) | |
| throw Exception("file.lock", | |
| &file_spec, | |
| "shared lock failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname); | |
| struct stat finfo; | |
| if(stat(fname, &finfo)!=0) | |
| throw Exception("file.missing", // hardly possible: we just opened it OK | |
| &file_spec, | |
| "stat failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname); | |
| #ifdef PA_SAFE_MODE | |
| check_safe_mode(finfo, file_spec, fname); | |
| #endif | |
| action(finfo, f, file_spec, fname, as_text, context); | |
| } catch(...) { | |
| pa_unlock(f);close(f); | |
| if(fail_on_read_problem) | |
| rethrow; | |
| return false; | |
| } | |
| pa_unlock(f);close(f); | |
| return true; | |
| } else { | |
| if(fail_on_read_problem) | |
| throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0, | |
| &file_spec, | |
| "%s failed: %s (%d), actual filename '%s'", | |
| action_name, strerror(errno), errno, fname); | |
| return false; | |
| } | } |
| if(access(fname, R_OK|W_OK)==0) { | } |
| int mode=O_RDWR | |
| #ifdef WIN32 | static void create_dir_for_file(const String& file_spec) { |
| |O_TRUNC | size_t pos_after=1; |
| size_t pos_before; | |
| while((pos_before=file_spec.pos('/', pos_after))!=STRING_NOT_FOUND) { | |
| mkdir(file_spec.mid(0, pos_before).cstr(String::L_FILE_SPEC), 0775); | |
| pos_after=pos_before+1; | |
| } | |
| } | |
| bool file_write_action_under_lock( | |
| const String& file_spec, | |
| const char* action_name, File_write_action action, void *context, | |
| bool as_text, | |
| bool do_append, | |
| bool do_block, | |
| bool fail_on_lock_problem) { | |
| const char* fname=file_spec.cstr(String::L_FILE_SPEC); | |
| int f; | |
| if(access(fname, W_OK)!=0) // no | |
| create_dir_for_file(file_spec); | |
| if((f=open(fname, | |
| O_CREAT|O_RDWR | |
| |(as_text?_O_TEXT:_O_BINARY) | |
| |(do_append?O_APPEND:PA_O_TRUNC), 0664))>=0) { | |
| if((do_block?pa_lock_exclusive_blocking(f):pa_lock_exclusive_nonblocking(f))!=0) { | |
| Exception e("file.lock", | |
| &file_spec, | |
| "shared lock failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname); | |
| close(f); | |
| if(fail_on_lock_problem) | |
| throw e; | |
| return false; | |
| } | |
| try { | |
| action(f, context); | |
| } catch(...) { | |
| #ifdef HAVE_FTRUNCATE | |
| if(!do_append) | |
| ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower | |
| #endif | #endif |
| ; | pa_unlock(f);close(f); |
| mode|=as_text?_O_TEXT:_O_BINARY; | rethrow; |
| if((f=open(fname,mode,0666))>=0) { | } |
| /*if(exclusive) | |
| flock(f, LOCK_EX);*/ | #ifdef HAVE_FTRUNCATE |
| if(!do_append) | |
| if(size) write(f,data,size); | ftruncate(f, lseek(f, 0, SEEK_CUR)); // O_TRUNC truncates even exclusevely write-locked file [thanks to Igor Milyakov <virtan@rotabanner.com> for discovering] |
| #ifndef WIN32 | #endif |
| ftruncate(f,size); | pa_unlock(f);close(f); |
| return true; | |
| } else | |
| throw Exception(errno==EACCES?"file.access":0, | |
| &file_spec, | |
| "%s failed: %s (%d), actual filename '%s'", | |
| action_name, strerror(errno), errno, fname); | |
| // here should be nothing, see rethrow above | |
| } | |
| #ifndef DOXYGEN | |
| struct File_write_action_info { | |
| const char* str; size_t length; | |
| }; | |
| #endif | #endif |
| /*if(exclusive) | static void file_write_action(int f, void *context) { |
| flock(f, LOCK_UN);*/ | File_write_action_info& info=*static_cast<File_write_action_info *>(context); |
| close(f); | if(info.length) { |
| return; | int written=write(f, info.str, info.length); |
| if(written<0) | |
| throw Exception(0, | |
| 0, | |
| "write failed: %s (%d)", strerror(errno), errno); | |
| } | |
| } | |
| void file_write( | |
| const String& file_spec, | |
| const char* data, size_t size, | |
| bool as_text, | |
| bool do_append) { | |
| File_write_action_info info={data, size}; | |
| file_write_action_under_lock( | |
| file_spec, | |
| "write", file_write_action, &info, | |
| as_text, | |
| do_append); | |
| } | |
| // throws nothing! [this is required in file_move & file_delete] | |
| static void rmdir(const String& file_spec, size_t pos_after) { | |
| size_t pos_before; | |
| if((pos_before=file_spec.pos('/', pos_after))!=STRING_NOT_FOUND) | |
| rmdir(file_spec, pos_before+1); | |
| rmdir(file_spec.mid(0, pos_after-1/* / */).cstr(String::L_FILE_SPEC)); | |
| } | |
| bool file_delete(const String& file_spec, bool fail_on_problem) { | |
| const char* fname=file_spec.cstr(String::L_FILE_SPEC); | |
| if(unlink(fname)!=0) | |
| if(fail_on_problem) | |
| throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0, | |
| &file_spec, | |
| "unlink failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname); | |
| else | |
| return false; | |
| rmdir(file_spec, 1); | |
| return true; | |
| } | |
| void file_move(const String& old_spec, const String& new_spec) { | |
| const char* old_spec_cstr=old_spec.cstr(String::L_FILE_SPEC); | |
| const char* new_spec_cstr=new_spec.cstr(String::L_FILE_SPEC); | |
| create_dir_for_file(new_spec); | |
| if(rename(old_spec_cstr, new_spec_cstr)!=0) | |
| throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0, | |
| &old_spec, | |
| "rename failed: %s (%d), actual filename '%s' to '%s'", | |
| strerror(errno), errno, old_spec_cstr, new_spec_cstr); | |
| rmdir(old_spec, 1); | |
| } | |
| bool entry_exists(const char* fname, struct stat *afinfo) { | |
| struct stat lfinfo; | |
| bool result=stat(fname, &lfinfo)==0; | |
| if(afinfo) | |
| *afinfo=lfinfo; | |
| return result; | |
| } | |
| bool entry_exists(const String& file_spec) { | |
| const char* fname=file_spec.cstr(String::L_FILE_SPEC); | |
| return entry_exists(fname, 0); | |
| } | |
| static bool entry_readable(const String& file_spec, bool need_dir) { | |
| char* fname=file_spec.cstrm(String::L_FILE_SPEC); | |
| if(need_dir) { | |
| size_t size=strlen(fname); | |
| while(size) { | |
| char c=fname[size-1]; | |
| if(c=='/' || c=='\\') | |
| fname[--size]=0; | |
| else | |
| break; | |
| } | } |
| } | } |
| PTHROW(0, 0, | struct stat finfo; |
| &file_spec, | if(access(fname, R_OK)==0 && entry_exists(fname, &finfo)) { |
| "write %s (#%d)", strerror(errno), errno); | bool is_dir=(finfo.st_mode&S_IFDIR) != 0; |
| return is_dir==need_dir; | |
| } | |
| return false; | |
| } | |
| bool file_readable(const String& file_spec) { | |
| return entry_readable(file_spec, false); | |
| } | |
| bool dir_readable(const String& file_spec) { | |
| return entry_readable(file_spec, true); | |
| } | |
| const String* file_readable(const String& path, const String& name) { | |
| String& result=*new String(path); | |
| result << "/"; | |
| result << name; | |
| return file_readable(result)?&result:0; | |
| } | |
| bool file_executable(const String& file_spec) { | |
| return access(file_spec.cstr(String::L_FILE_SPEC), X_OK)==0; | |
| } | |
| bool file_stat(const String& file_spec, | |
| size_t& rsize, | |
| time_t& ratime, | |
| time_t& rmtime, | |
| time_t& rctime, | |
| bool fail_on_read_problem) { | |
| const char* fname=file_spec.cstr(String::L_FILE_SPEC); | |
| struct stat finfo; | |
| if(stat(fname, &finfo)!=0) | |
| if(fail_on_read_problem) | |
| throw Exception("file.missing", | |
| &file_spec, | |
| "getting file size failed: %s (%d), real filename '%s'", | |
| strerror(errno), errno, fname); | |
| else | |
| return false; | |
| rsize=finfo.st_size; | |
| ratime=finfo.st_atime; | |
| rmtime=finfo.st_mtime; | |
| rctime=finfo.st_ctime; | |
| return true; | |
| } | } |
| char *getrow(char **row_ref, char delim) { | char* getrow(char* *row_ref, char delim) { |
| char *result=*row_ref; | char* result=*row_ref; |
| if(result) { | if(result) { |
| *row_ref=strchr(result, delim); | *row_ref=strchr(result, delim); |
| if(*row_ref) | if(*row_ref) |
| *((*row_ref)++)=0; | *((*row_ref)++)=0; |
| else if(!*result) | else if(!*result) |
| Line 121 char *getrow(char **row_ref, char delim) | Line 995 char *getrow(char **row_ref, char delim) |
| return result; | return result; |
| } | } |
| char *lsplit(char *string, char delim) { | char* lsplit(char* string, char delim) { |
| if(string) { | if(string) { |
| char *v=strchr(string, delim); | char* v=strchr(string, delim); |
| if(v) { | if(v) { |
| *v=0; | *v=0; |
| return v+1; | return v+1; |
| Line 132 char *lsplit(char *string, char delim) { | Line 1006 char *lsplit(char *string, char delim) { |
| return 0; | return 0; |
| } | } |
| char *lsplit(char **string_ref, char delim) { | char* lsplit(char* *string_ref, char delim) { |
| char *result=*string_ref; | char* result=*string_ref; |
| char *next=lsplit(*string_ref, delim); | char* next=lsplit(*string_ref, delim); |
| *string_ref=next; | *string_ref=next; |
| return result; | return result; |
| } | } |
| char *rsplit(char *string, char delim) { | char* rsplit(char* string, char delim) { |
| if(string) { | if(string) { |
| char *v=strrchr(string, delim); | char* v=strrchr(string, delim); |
| if(v) { | if(v) { |
| *v=0; | *v=0; |
| return v+1; | return v+1; |
| Line 150 char *rsplit(char *string, char delim) { | Line 1024 char *rsplit(char *string, char delim) { |
| return NULL; | return NULL; |
| } | } |
| char *format(Pool& pool, double value, char *fmt) { | /// @todo less stupid type detection |
| char *result=(char *)pool.malloc(MAX_NUMBER); | const char* format(double value, char* fmt) { |
| char local_buf[MAX_NUMBER]; | |
| size_t size; | |
| if(fmt) | if(fmt) |
| if(strpbrk(fmt, "diouxX")) | if(strpbrk(fmt, "diouxX")) |
| if(strpbrk(fmt, "ouxX")) | if(strpbrk(fmt, "ouxX")) |
| snprintf(result, MAX_NUMBER, fmt,(uint)value ); | size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value); |
| else | else |
| snprintf(result, MAX_NUMBER, fmt,(int)value ); | size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value); |
| else | else |
| snprintf(result, MAX_NUMBER, fmt, value); | size=snprintf(local_buf, sizeof(local_buf), fmt, value); |
| else | else |
| snprintf(result, MAX_NUMBER, "%d",(int)value); | size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value); |
| return result; | return pa_strdup(local_buf, size); |
| } | } |
| size_t stdout_write(const char *buf, size_t size) { | size_t stdout_write(const void *buf, size_t size) { |
| #ifdef WIN32 | #ifdef WIN32 |
| do{ | do{ |
| int chunk_written=fwrite(buf, 1, min(8*0x400, size), stdout); | int chunk_written=fwrite(buf, 1, min((size_t)8*0x400, size), stdout); |
| if(chunk_written<=0) | if(chunk_written<=0) |
| break; | break; |
| size-=chunk_written; | size-=chunk_written; |
| buf+=chunk_written; | buf=((const char*)buf)+chunk_written; |
| } while(size>0); | } while(size>0); |
| return size; | return size; |
| #else | #else |
| return fwrite(buf, 1, size, stdout); | return fwrite(buf, 1, size, stdout); |
| #endif | #endif |
| } | } |
| const char *unescape_chars(Pool& pool, const char *cp, int len) { | char* unescape_chars(const char* cp, int len) { |
| char *s=(char *)pool.malloc(len + 1); | char* s=new(PointerFreeGC) char[len + 1]; |
| enum EscapeState { | enum EscapeState { |
| EscapeRest, | EscapeRest, |
| EscapeFirst, | EscapeFirst, |
| EscapeSecond | EscapeSecond |
| } escapeState=EscapeRest; | } escapeState=EscapeRest; |
| int escapedValue=0; | int escapedValue=0; |
| int srcPos=0; | int srcPos=0; |
| int dstPos=0; | int dstPos=0; |
| while(srcPos < len) { | while(srcPos < len) { |
| int ch=cp[srcPos]; | int ch=cp[srcPos]; |
| switch(escapeState) { | switch(escapeState) { |
| case EscapeRest: | case EscapeRest: |
| if(ch=='%') { | if(ch=='%') { |
| escapeState=EscapeFirst; | escapeState=EscapeFirst; |
| } else if(ch=='+') { | } else if(ch=='+') { |
| s[dstPos++]=' '; | s[dstPos++]=' '; |
| } else { | } else { |
| s[dstPos++]=ch; | s[dstPos++]=ch; |
| } | } |
| Line 209 const char *unescape_chars(Pool& pool, c | Line 1086 const char *unescape_chars(Pool& pool, c |
| escapeState=EscapeSecond; | escapeState=EscapeSecond; |
| break; | break; |
| case EscapeSecond: | case EscapeSecond: |
| escapedValue +=hex_value[ch]; | escapedValue +=hex_value[ch]; |
| s[dstPos++]=escapedValue; | s[dstPos++]=escapedValue; |
| escapeState=EscapeRest; | escapeState=EscapeRest; |
| break; | break; |
| } | } |
| srcPos++; | srcPos++; |
| } | } |
| s[dstPos]=0; | s[dstPos]=0; |
| return s; | return s; |
| } | } |
| static void append_attribute_subattribute(const Hash::Key& akey, Hash::Val *avalue, | |
| void *info) { | |
| if(akey==VALUE_NAME) | |
| return; | |
| // ...; charset=windows1251 | |
| String *string=static_cast<String *>(info); | |
| string->APPEND_CONST("; "); | |
| string->append(akey, String::UL_HEADER, true); | |
| string->APPEND_CONST("="); | |
| string->append(static_cast<Value *>(avalue)->as_string(), | |
| String::UL_HEADER, true); | |
| } | |
| const String& attributed_meaning_to_string(Value& meaning) { | |
| String &result=*new(meaning.pool()) String(meaning.pool()); | |
| if(Hash *hash=meaning.get_hash()) { | |
| // $value(value) $subattribute(subattribute value) | |
| if(Value *value=static_cast<Value *>(hash->get(*value_name))) | |
| result.append(value->as_string(), String::UL_HEADER, true); | |
| hash->for_each(append_attribute_subattribute, &result); | |
| } else // result value | |
| result.append(meaning.as_string(), String::UL_HEADER, true); | |
| return result; | |
| } | |
| #ifdef WIN32 | #ifdef WIN32 |
| void back_slashes_to_slashes(char *s) { | void back_slashes_to_slashes(char* s) { |
| if(s) | if(s) |
| for(; *s; s++) | for(; *s; s++) |
| if(*s=='\\') | if(*s=='\\') |
| *s='/'; | *s='/'; |
| } | |
| /* | |
| void slashes_to_back_slashes(char* s) { | |
| if(s) | |
| for(; *s; s++) | |
| if(*s=='/') | |
| *s='\\'; | |
| } | |
| */ | |
| #endif | |
| bool StrEqNc(const char* s1, const char* s2, bool strict) { | |
| while(true) { | |
| if(!(*s1)) { | |
| if(!(*s2)) | |
| return true; | |
| else | |
| return !strict; | |
| } else if(!(*s2)) | |
| return !strict; | |
| if(isalpha(*s1)) { | |
| if(tolower(*s1) !=tolower(*s2)) | |
| return false; | |
| } else if((*s1) !=(*s2)) | |
| return false; | |
| s1++; | |
| s2++; | |
| } | |
| } | |
| static bool isLeap(int year) { | |
| return !( | |
| (year % 4) || ((year % 400) && !(year % 100)) | |
| ); | |
| } | |
| int getMonthDays(int year, int month) { | |
| int monthDays[]={ | |
| 31, | |
| isLeap(year) ? 29 : 28, | |
| 31, | |
| 30, | |
| 31, | |
| 30, | |
| 31, | |
| 31, | |
| 30, | |
| 31, | |
| 30, | |
| 31 | |
| }; | |
| return monthDays[month]; | |
| } | |
| void remove_crlf(char* start, char* end) { | |
| for(char* p=start; p<end; p++) | |
| switch(*p) { | |
| case '\n': *p='|'; break; | |
| case '\r': *p=' '; break; | |
| } | |
| } | |
| /// must be last in this file | |
| #undef vsnprintf | |
| int __vsnprintf(char* b, size_t s, const char* f, va_list l) { | |
| if(!s) | |
| return 0; | |
| int r; | |
| // note: on win32& maybe somewhere else | |
| // vsnprintf do not writes terminating 0 in 'buffer full' case, reducing | |
| --s; | |
| // clients do not check for negative 's', feature: ignore such prints | |
| if((ssize_t)s<0) | |
| return 0; | |
| #if _MSC_VER | |
| /* | |
| win32: | |
| mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001APR\1033\vccore.chm::/html/_crt__vsnprintf.2c_._vsnwprintf.htm | |
| if the number of bytes to write exceeds buffer, then count bytes are written and Ö1 is returned | |
| */ | |
| r=_vsnprintf(b, s, f, l); | |
| if(r<0) | |
| r=s; | |
| #else | |
| r=vsnprintf(b, s, f, l); | |
| /* | |
| solaris: | |
| man vsnprintf | |
| The snprintf() function returns the number of characters | |
| formatted, that is, the number of characters that would have | |
| been written to the buffer if it were large enough. If the | |
| value of n is 0 on a call to snprintf(), an unspecified | |
| value less than 1 is returned. | |
| */ | |
| if(r<0) | |
| r=0; | |
| else if((size_t)r>s) | |
| r=s; | |
| #endif | |
| b[r]=0; | |
| return r; | |
| } | |
| int __snprintf(char* b, size_t s, const char* f, ...) { | |
| va_list l; | |
| va_start(l, f); | |
| int r=__vsnprintf(b, s, f, l); | |
| va_end(l); | |
| return r; | |
| } | } |
| /* mime64 functions are from libgmime[http://spruce.sourceforge.net/gmime/] lib */ | |
| /* | |
| * Authors: Michael Zucchi <notzed@helixcode.com> | |
| * Jeffrey Stedfast <fejj@helixcode.com> | |
| * | |
| * Copyright 2000 Helix Code, Inc. (www.helixcode.com) | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License as published by | |
| * the Free Software Foundation; either version 2 of the License, or | |
| * (at your option) any later version. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| * GNU General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU General Public License | |
| * along with this program; if not, write to the Free Software | |
| * Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA. | |
| * | |
| */ | |
| static char *base64_alphabet = | |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; | |
| /** | |
| * g_mime_utils_base64_encode_step: | |
| * @in: input stream | |
| * @inlen: length of the input | |
| * @out: output string | |
| * @state: holds the number of bits that are stored in @save | |
| * @save: leftover bits that have not yet been encoded | |
| * | |
| * Base64 encodes a chunk of data. Performs an 'encode step', only | |
| * encodes blocks of 3 characters to the output at a time, saves | |
| * left-over state in state and save (initialise to 0 on first | |
| * invocation). | |
| * | |
| * Returns the number of bytes encoded. | |
| **/ | |
| static size_t | |
| g_mime_utils_base64_encode_step (const unsigned char *in, size_t inlen, unsigned char *out, int *state, int *save) | |
| { | |
| const register unsigned char *inptr; | |
| register unsigned char *outptr; | |
| if (inlen <= 0) | |
| return 0; | |
| inptr = in; | |
| outptr = out; | |
| if (inlen + ((unsigned char *)save)[0] > 2) { | |
| const unsigned char *inend = in + inlen - 2; | |
| register int c1 = 0, c2 = 0, c3 = 0; | |
| register int already; | |
| already = *state; | |
| switch (((char *)save)[0]) { | |
| case 1: c1 = ((unsigned char *)save)[1]; goto skip1; | |
| case 2: c1 = ((unsigned char *)save)[1]; | |
| c2 = ((unsigned char *)save)[2]; goto skip2; | |
| } | |
| /* yes, we jump into the loop, no i'm not going to change it, its beautiful! */ | |
| while (inptr < inend) { | |
| c1 = *inptr++; | |
| skip1: | |
| c2 = *inptr++; | |
| skip2: | |
| c3 = *inptr++; | |
| *outptr++ = base64_alphabet [c1 >> 2]; | |
| *outptr++ = base64_alphabet [(c2 >> 4) | ((c1 & 0x3) << 4)]; | |
| *outptr++ = base64_alphabet [((c2 & 0x0f) << 2) | (c3 >> 6)]; | |
| *outptr++ = base64_alphabet [c3 & 0x3f]; | |
| /* this is a bit ugly ... */ | |
| if ((++already) >= 19) { | |
| *outptr++ = '\n'; | |
| already = 0; | |
| } | |
| } | |
| ((unsigned char *)save)[0] = 0; | |
| inlen = 2 - (inptr - inend); | |
| *state = already; | |
| } | |
| //d(printf ("state = %d, inlen = %d\n", (int)((char *)save)[0], inlen)); | |
| if (inlen > 0) { | |
| register char *saveout; | |
| /* points to the slot for the next char to save */ | |
| saveout = & (((char *)save)[1]) + ((char *)save)[0]; | |
| /* inlen can only be 0 1 or 2 */ | |
| switch (inlen) { | |
| case 2: *saveout++ = *inptr++; | |
| case 1: *saveout++ = *inptr++; | |
| } | |
| ((char *)save)[0] += inlen; | |
| } | |
| /*d(printf ("mode = %d\nc1 = %c\nc2 = %c\n", | |
| (int)((char *)save)[0], | |
| (int)((char *)save)[1], | |
| (int)((char *)save)[2]));*/ | |
| return (outptr - out); | |
| } | |
| /** | |
| * g_mime_utils_base64_encode_close: | |
| * @in: input stream | |
| * @inlen: length of the input | |
| * @out: output string | |
| * @state: holds the number of bits that are stored in @save | |
| * @save: leftover bits that have not yet been encoded | |
| * | |
| * Base64 encodes the input stream to the output stream. Call this | |
| * when finished encoding data with g_mime_utils_base64_encode_step to | |
| * flush off the last little bit. | |
| * | |
| * Returns the number of bytes encoded. | |
| **/ | |
| static size_t | |
| g_mime_utils_base64_encode_close (const unsigned char *in, size_t inlen, unsigned char *out, int *state, int *save) | |
| { | |
| unsigned char *outptr = out; | |
| int c1, c2; | |
| if (inlen > 0) | |
| outptr += g_mime_utils_base64_encode_step (in, inlen, outptr, state, save); | |
| c1 = ((unsigned char *)save)[1]; | |
| c2 = ((unsigned char *)save)[2]; | |
| switch (((unsigned char *)save)[0]) { | |
| case 2: | |
| outptr[2] = base64_alphabet [(c2 & 0x0f) << 2]; | |
| goto skip; | |
| case 1: | |
| outptr[2] = '='; | |
| skip: | |
| outptr[0] = base64_alphabet [c1 >> 2]; | |
| outptr[1] = base64_alphabet [c2 >> 4 | ((c1 & 0x3) << 4)]; | |
| outptr[3] = '='; | |
| outptr += 4; | |
| break; | |
| } | |
| *outptr++ = 0; | |
| *save = 0; | |
| *state = 0; | |
| return (outptr - out); | |
| } | |
| char* pa_base64(const char *in, size_t len) | |
| { | |
| /* wont go to more than 2x size (overly conservative) */ | |
| char* result=new(PointerFreeGC) char[len * 2 + 6]; | |
| int state=0; | |
| int save=0; | |
| #ifndef NDEBUG | |
| size_t filled= | |
| #endif | #endif |
| g_mime_utils_base64_encode_close ((const unsigned char*)in, len, | |
| (unsigned char*)result, &state, &save); | |
| assert(filled <= len * 2 + 6); | |
| return result; | |
| } |