--- parser3/src/main/pa_common.C 2001/04/03 06:23:05 1.36 +++ parser3/src/main/pa_common.C 2004/12/10 07:31:27 1.196 @@ -1,150 +1,1050 @@ - /** @file Parser: commonly functions. - Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com) - - Author: Alexander Petrosyan (http://design.ru/paf) - - $Id: pa_common.C,v 1.36 2001/04/03 06:23:05 paf Exp $ + Copyright(c) 2001-2004 ArtLebedev Group (http://www.artlebedev.com) + Author: Alexandr Petrosian (http://paf.design.ru) */ -#include "pa_config_includes.h" - -#include -#include -#include -#include -#include +static const char * const IDENT_COMMON_C="$Date: 2004/12/10 07:31:27 $"; #include "pa_common.h" -#include "pa_types.h" #include "pa_exception.h" -#include "pa_pool.h" -#include "pa_globals.h" -#include "pa_value.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) { - int r=_vsnprintf(b, --s, f, l); - b[s]=0; - return r; +#ifdef PA_HTTP +#include "pa_vstring.h" +#include "pa_vint.h" +#include "pa_vhash.h" +#include "pa_vtable.h" +#include "pa_socks.h" + +#ifdef CYGWIN +#define _GNU_H_WINDOWS32_SOCKETS +// for PASCAL +#include +// SOCKET +typedef u_int SOCKET; +int PASCAL closesocket(SOCKET); +#else +# if defined(WIN32) +# include +# else +# define closesocket close +# endif +#endif + +#else + +# if defined(WIN32) +# include +# 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]sin_family=AF_INET; + addr->sin_port=htons(port); + if(host) { + ulong packed_ip=inet_addr(host); + if(packed_ip!=INADDR_NONE) + memcpy(&addr->sin_addr, &packed_ip, sizeof(packed_ip)); + else { + struct hostent *hostIP=gethostbyname(host); + 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) { + if(int no=pa_socks_errno()) + throw Exception("http.connect", + 0, + "error receiving response: %s (%d)", pa_socks_strerr(no), no); + 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, "\n"))) { // 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 +#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) { - void *result; - size_t size; - return file_read(pool, file_spec, result, size, true, - fail_on_read_problem)?(char *)result:0; +static int http_request(char*& response, size_t& response_size, + const char* host, short port, + const char* request, + int timeout_secs, + 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_secs); +#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) { + int no=pa_socks_errno(); + throw Exception("http.connect", + 0, + "can not make socket: %s (%d)", pa_socks_strerr(no), no); + } + +#ifdef SO_DONTLINGER + int dont_linger = 0; + setsockopt(sock, SOL_SOCKET, SO_DONTLINGER, (const char *)&dont_linger, sizeof(dont_linger)); +#else + // To enable SO_DONTLINGER (that is, disable SO_LINGER) + // l_onoff should be set to zero and setsockopt should be called + linger dont_linger={0,0}; + setsockopt(sock, SOL_SOCKET, SO_LINGER, (const char *)&dont_linger, sizeof(dont_linger)); +#endif + +#ifndef PA_USE_ALARM + int timeout_ms=timeout_secs*1000; + setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (const char*)&timeout_ms, sizeof(timeout_ms)); + setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (const char*)&timeout_ms, sizeof(timeout_ms)); +#endif + + if(connect(sock, (struct sockaddr *)&dest, sizeof(dest))) { + int no=pa_socks_errno(); + throw Exception("http.connect", + 0, + "can not connect to host \"%s\": %s (%d)", host, pa_socks_strerr(no), no); + } + size_t request_size=strlen(request); + if(send(sock, request, request_size, 0)!=(ssize_t)request_size) { + int no=pa_socks_errno(); + throw Exception("http.connect", + 0, + "error sending request: %s (%d)", pa_socks_strerr(no), no); + } + + 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 } -bool file_read(Pool& pool, const String& file_spec, - void*& data, size_t& size, bool as_text, - bool fail_on_read_problem) { - char *fname=file_spec.cstr(); + +#ifndef DOXYGEN +struct Http_pass_header_info { + Request_charsets* charsets; + String* request; + bool user_agent_specified; +}; +#endif +static void http_pass_header(HashStringValue::key_type key, + HashStringValue::value_type value, + Http_pass_header_info *info) { + *info->request <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<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 +static void find_headers_end(char* p, + char*& headers_end_at, + char*& raw_body) +{ + raw_body=p; + // \n\n + // \r\n\r\n + while((p=strchr(p, '\n'))) { + headers_end_at=++p; // \n>.< + if(*p=='\r') // \r\n>\r?<\n + p++; + if(*p=='\n') { // \r\n\r>\n?< + raw_body=p+1; + return; + } + } + headers_end_at=0; +} + +/// @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; + short port; + const char* method="GET"; bool method_is_get; + HashStringValue* form=0; + const char* body_cstr=0; + int timeout_secs=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_secs=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?(short)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<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_secs, fail_on_status_ne_200); + + //processing results + char* raw_body; size_t raw_body_size; + char* headers_end_at; + find_headers_end(response, + headers_end_at, + raw_body); + raw_body_size=response_size-(raw_body-response); + + result.headers=new HashStringValue; + VHash* vtables=new VHash; + result.headers->put(HTTP_TABLES_NAME, vtables); + Charset* real_remote_charset=0; // undetected, yet + + if(headers_end_at) { + *headers_end_at=0; + const String header_block(String::C(response, headers_end_at-response), true); + + ArrayString aheaders; + HashStringValue& tables=vtables->hash(); + + size_t pos_after=0; + header_block.split(aheaders, pos_after, "\n"); + + //processing headers + size_t aheaders_count=aheaders.count(); + for(size_t i=1; iget_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)); + } + } + + // 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 + // defaulting to used-asked charset [it's never empty!] + if(!real_remote_charset) + real_remote_charset=asked_remote_charset; + real_body=Charset::transcode(real_body, *real_remote_charset, charsets.source()); + } + + result.str=const_cast(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; + char* buf; size_t offset; size_t count; +}; +#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(context); + size_t to_read_size=info.count; + if(!to_read_size) + to_read_size=(size_t)finfo.st_size; + assert( !(info.buf && as_text) ); + if(to_read_size) { + if(info.offset) + lseek(f, info.offset, SEEK_SET); + *info.data=info.buf + ? info.buf + : 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, + char* buf, size_t offset, size_t count) { + 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, + buf, offset, count}; + 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; - struct stat finfo; // first open, next stat: - // directory update of NTFS symbolic links performed on open. + // 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, + // 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. - if( - (f=open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0 && - stat(fname, &finfo)==0) { - /*if(exclusive) - flock(f, LOCK_EX);*/ - data=pool.malloc(finfo.st_size+(as_text?1:0)); - size=read(f, data, finfo.st_size); - /*if(exclusive) - flock(f, LOCK_UN);*/ - close(f); - - if(size>=0 && size<=(size_t)finfo.st_size) { - if(as_text) - ((char *)data)[size]=0; - } else - PTHROW(0, 0, + // 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, - "read failed: actually read %d bytes count not in [0..%ul] valid range", - size, (unsigned long)finfo.st_size); //never - - return true;//prepare_config(result, remove_empty_lines); - } - if(fail_on_read_problem) - PTHROW(0, 0, - &file_spec, - "read failed: %s (#%d)", strerror(errno), errno); - return false; + "%s failed: %s (%d), actual filename '%s'", + action_name, strerror(errno), errno, fname); + return false; + } } -void file_write(Pool& pool, +static void create_dir_for_file(const String& file_spec) { + 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 void *data, size_t size, - bool as_text/*, - bool exclusive*/) { - char *fname=file_spec.cstr(); + 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, F_OK)!=0) {/*no*/ - if((f=open(fname, O_WRONLY|O_CREAT|_O_BINARY, 0666))>0) - close(f); - } - if(access(fname, R_OK|W_OK)==0) { - int mode=O_RDWR|(as_text?_O_TEXT:_O_BINARY) -#ifdef WIN32 - |O_TRUNC -#endif - ; - if((f=open(fname, mode, 0666))>=0) { - /*if(exclusive) - flock(f, LOCK_EX);*/ - - if(size) write(f, data, size); -#ifndef WIN32 - ftruncate(f, size); + 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 - /*if(exclusive) - flock(f, LOCK_UN);*/ - close(f); - return; + pa_unlock(f);close(f); + rethrow; } + +#ifdef HAVE_FTRUNCATE + if(!do_append) + ftruncate(f, lseek(f, 0, SEEK_CUR)); // O_TRUNC truncates even exclusevely write-locked file [thanks to Igor Milyakov for discovering] +#endif + 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 +static void file_write_action(int f, void *context) { + File_write_action_info& info=*static_cast(context); + if(info.length) { + int written=write(f, info.str, info.length); + if(written<0) + throw Exception(0, + 0, + "write failed: %s (%d)", strerror(errno), errno); } - PTHROW(0, 0, - &file_spec, - "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); } -void file_delete(Pool& pool, const String& file_spec) { - if(unlink(file_spec.cstr())!=0) - PTHROW(0, 0, - &file_spec, - "unlink failed: %s (#%d)", strerror(errno), errno); +// 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; + } + } + struct stat finfo; + if(access(fname, R_OK)==0 && entry_exists(fname, &finfo)) { + bool is_dir=(finfo.st_mode&S_IFDIR) != 0; + return is_dir==need_dir; + } + return false; +} bool file_readable(const String& file_spec) { - return access(file_spec.cstr(), R_OK)==0; + 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 *result=*row_ref; +char* getrow(char* *row_ref, char delim) { + char* result=*row_ref; if(result) { - *row_ref=strchr(result, delim); + *row_ref=strchr(result, delim); if(*row_ref) *((*row_ref)++)=0; else if(!*result) @@ -153,9 +1053,9 @@ char *getrow(char **row_ref, char delim) return result; } -char *lsplit(char *string, char delim) { +char* lsplit(char* string, char delim) { if(string) { - char *v=strchr(string, delim); + char* v=strchr(string, delim); if(v) { *v=0; return v+1; @@ -164,16 +1064,16 @@ char *lsplit(char *string, char delim) { return 0; } -char *lsplit(char **string_ref, char delim) { - char *result=*string_ref; - char *next=lsplit(*string_ref, delim); +char* lsplit(char* *string_ref, char delim) { + char* result=*string_ref; + char* next=lsplit(*string_ref, delim); *string_ref=next; return result; } -char *rsplit(char *string, char delim) { +char* rsplit(char* string, char delim) { if(string) { - char *v=strrchr(string, delim); + char* v=strrchr(string, delim); if(v) { *v=0; return v+1; @@ -182,108 +1082,376 @@ char *rsplit(char *string, char delim) { return NULL; } -char *format(Pool& pool, double value, char *fmt) { - char *result=(char *)pool.malloc(MAX_NUMBER); +/// @todo less stupid type detection +const char* format(double value, char* fmt) { + char local_buf[MAX_NUMBER]; + size_t size; + if(fmt) if(strpbrk(fmt, "diouxX")) if(strpbrk(fmt, "ouxX")) - snprintf(result, MAX_NUMBER, fmt, (uint)value ); + size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value); else - snprintf(result, MAX_NUMBER, fmt, (int)value ); + size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value); else - snprintf(result, MAX_NUMBER, fmt, value); + size=snprintf(local_buf, sizeof(local_buf), fmt, value); 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 void *buf, size_t size) { #ifdef WIN32 + size_t to_write = size; 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) break; size-=chunk_written; buf=((const char*)buf)+chunk_written; - } while(size>0); + } while(size>0); - return size; + return to_write-size; #else - return fwrite(buf, 1, size, stdout); + return fwrite(buf, 1, size, stdout); #endif } -const char *unescape_chars(Pool& pool, const char *cp, int len) { - char *s=(char *)pool.malloc(len + 1); +char* unescape_chars(const char* cp, int len) { + char* s=new(PointerFreeGC) char[len + 1]; enum EscapeState { EscapeRest, EscapeFirst, EscapeSecond } escapeState=EscapeRest; - int escapedValue=0; + uchar escapedValue=0; int srcPos=0; int dstPos=0; while(srcPos < len) { - int ch=cp[srcPos]; + uchar ch=(uchar)cp[srcPos]; switch(escapeState) { case EscapeRest: if(ch=='%') { escapeState=EscapeFirst; } else if(ch=='+') { - s[dstPos++]=' '; + s[dstPos++]=' '; } else { s[dstPos++]=ch; } break; case EscapeFirst: - escapedValue=hex_value[ch] << 4; + escapedValue=(uchar)(hex_value[ch] << 4); escapeState=EscapeSecond; break; case EscapeSecond: - escapedValue +=hex_value[ch]; + escapedValue +=hex_value[ch]; s[dstPos++]=escapedValue; escapeState=EscapeRest; break; } - srcPos++; + srcPos++; } s[dstPos]=0; 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(info); - string->APPEND_CONST("; "); - string->append(akey, String::UL_HEADER, true); - string->APPEND_CONST("="); - string->append(static_cast(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(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 -void back_slashes_to_slashes(char *s) { +void back_slashes_to_slashes(char* s) { if(s) for(; *s; 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((unsigned char)*s1)) { + if(tolower((unsigned char)*s1) !=tolower((unsigned char)*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; ps) + 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 + * Jeffrey Stedfast + * + * 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) +{ + register const 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 + g_mime_utils_base64_encode_close ((const unsigned char*)in, len, + (unsigned char*)result, &state, &save); + assert(filled <= len * 2 + 6); + + return result; +}