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| version 1.4, 2001/03/10 15:44:31 | version 1.157, 2003/09/26 13:36:35 |
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| Line 1 | Line 1 |
| /* | /** @file |
| $Id$ | Parser: commonly functions. |
| */ | |
| #ifdef HAVE_CONFIG_H | Copyright(c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) |
| # include "pa_config.h" | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| #endif | */ |
| #include <fcntl.h> | static const char* IDENT_COMMON_C="$Date$"; |
| #include <sys/types.h> | |
| #include <sys/stat.h> | |
| #include <io.h> | |
| #include <stdio.h> | |
| #include "pa_common.h" | #include "pa_common.h" |
| #include "pa_types.h" | |
| #include "pa_exception.h" | #include "pa_exception.h" |
| #include "pa_hash.h" | |
| #include "pa_globals.h" | |
| #include "pa_request_charsets.h" | |
| #include "pa_charsets.h" | |
| #define PA_HTTP | |
| #ifdef PA_HTTP | |
| #include "pa_vstring.h" | |
| #include "pa_vint.h" | |
| #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 | |
| // locking constants | |
| //#define PA_DEBUG_NO_LOCKING | |
| #ifdef PA_DEBUG_NO_LOCKING | |
| #ifdef HAVE_FLOCK | |
| static int lock_shared_blocking(int fd) { return flock(fd, LOCK_SH); } | |
| static int lock_exclusive_blocking(int fd) { return flock(fd, LOCK_EX); } | |
| static int lock_exclusive_nonblocking(int fd) { return flock(fd, LOCK_EX || LOCK_NB); } | |
| static int unlock(int fd) { return flock(fd, LOCK_UN); } | |
| #else | |
| #ifdef HAVE__LOCKING | |
| #define FLOCK(operation) lseek(fd, 0, SEEK_SET); return _locking(fd, operation, 1) | |
| static int lock_shared_blocking(int fd) { FLOCK(_LK_LOCK); } | |
| static int lock_exclusive_blocking(int fd) { FLOCK(_LK_LOCK); } | |
| static int lock_exclusive_nonblocking(int fd) { FLOCK(_LK_NBLCK); } | |
| static int unlock(int fd) { FLOCK(_LK_UNLCK); } | |
| #else | |
| #ifdef HAVE_FCNTL | |
| #define FLOCK(cmd, arg) struct flock ls={arg, SEEK_SET}; return fcntl(fd, cmd, &ls) | |
| static int lock_shared_blocking(int fd) { FLOCK(F_SETLKW, F_RDLCK); } | |
| static int lock_exclusive_blocking(int fd) { FLOCK(F_SETLKW, F_WRLCK); } | |
| static int lock_exclusive_nonblocking(int fd) { FLOCK(F_SETLK, F_RDLCK); } | |
| static int unlock(int fd) { FLOCK(F_SETLK, F_UNLCK); } | |
| #else | |
| #ifdef HAVE_LOCKF | |
| #define FLOCK(fd, operation) lseek(fd, 0, SEEK_SET); return lockf(fd, operation, 1) | |
| static int lock_shared_blocking(int fd) { FLOCK(F_LOCK); } // on intel solaris man doesn't have doc on shared blocking | |
| static int lock_exclusive_blocking(int fd) { FLOCK(F_LOCK); } | |
| static int lock_exclusive_nonblocking(int fd) { FLOCK(F_TLOCK); } | |
| static int unlock(int fd) { FLOCK(F_TLOCK); } | |
| #else | |
| #error unable to find file locking func | |
| #endif | |
| #endif | |
| #endif | |
| #endif | |
| #else | |
| static int lock_shared_blocking(int fd) { return 0; } | |
| static int lock_exclusive_blocking(int fd) { return 0; } | |
| static int lock_exclusive_nonblocking(int fd) { return 0; } | |
| static int unlock(int fd) { return 0; } | |
| #endif | |
| // defines for globals | |
| #define FILE_STATUS_NAME "status" | |
| // globals | |
| const String file_status_name(FILE_STATUS_NAME); | |
| // defines for statics | |
| #define HTTP_METHOD_NAME "method" | |
| #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" | |
| // statics | |
| static const String http_method_name(HTTP_METHOD_NAME); | |
| static const String http_timeout_name(HTTP_TIMEOUT_NAME); | |
| static const String http_headers_name(HTTP_HEADERS_NAME); | |
| static const String http_any_status_name(HTTP_ANY_STATUS_NAME); | |
| static const String http_charset_name(HTTP_CHARSET_NAME); | |
| static const String http_tables_name(HTTP_TABLES_NAME); | |
| // 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 | |
| } | |
| char* file_read_text(Request_charsets& charsets, | |
| const String& file_spec, | |
| bool fail_on_read_problem, | |
| HashStringValue* params/*, HashStringValue* * out_fields*/) { | |
| File_read_result file= | |
| file_read(charsets, file_spec, true, params, fail_on_read_problem); | |
| return file.success?file.str:0; | |
| } | |
| #ifdef PA_HTTP | |
| //http request stuff | |
| #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) { | |
| if(struct hostent *hostIP=gethostbyname(host)) | |
| 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(String& response, int sock, bool fail_on_status_ne_200){ | |
| int result=0; | |
| size_t EOLat=0; | |
| while(true) { | |
| char *buf=new(PointerFreeGC) char[MAX_STRING]; | |
| ssize_t size=recv(sock, buf, MAX_STRING, 0); | |
| if(size<=0) | |
| break; | |
| response.append_strdup(buf, size, String::L_TAINTED); | |
| if(!result && (EOLat=response.pos(CRLF, 2))!=STRING_NOT_FOUND) { // checking status in first response | |
| const String& status_line=response.mid(0, (size_t)EOLat); | |
| ArrayString astatus; | |
| size_t pos_after=0; | |
| status_line.split(astatus, pos_after, " "); | |
| const String& status_code=*astatus.get(1); | |
| 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=%lu)", response.length()); | |
| } | |
| /* ********************** 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 | |
| static int http_request(String& response, | |
| const char* host, int port, | |
| const char* request, | |
| int timeout, | |
| 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, 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 | |
| } | |
| #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 <<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; | |
| } | |
| #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, | |
| HashStringValue *options=0) { | |
| File_read_http_result result; | |
| char host[MAX_STRING]; | |
| const char* uri; | |
| int port; | |
| const char* method=0; | |
| int timeout=2; | |
| bool fail_on_status_ne_200=true; | |
| Value* vheaders=0; | |
| Charset *asked_remote_charset=0; | |
| if(options) { | |
| int valid_options=0; | |
| if(Value* vmethod=options->get(http_method_name)) { | |
| valid_options++; | |
| method=vmethod->as_string().cstr(); | |
| } | |
| 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(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(); | |
| //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 | |
| const char* request_cstr; | |
| { | |
| // 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; | |
| //making request | |
| String request; | |
| if(method) | |
| request<<method; | |
| else | |
| request<<"GET"; | |
| request<< " "<< uri <<" HTTP/1.0" CRLF | |
| "host: "<< host << 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, &request}; | |
| 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 | |
| request << "user-agent: " DEFAULT_USER_AGENT CRLF; | |
| request << CRLF; | |
| request_cstr=request.cstr(String::L_UNSPECIFIED); | |
| } | |
| // recode those pieces which are not in String::L_URI lang | |
| // [those violating HTTP standard, but widly used] | |
| request_cstr=Charset::transcode( | |
| String::C(request_cstr, strlen(request_cstr)), | |
| charsets.source(), | |
| *asked_remote_charset); | |
| //sending request | |
| String response; | |
| int status_code=http_request(response, | |
| host, port, request_cstr, | |
| timeout, fail_on_status_ne_200); | |
| //processing results | |
| size_t pos=response.pos(CRLF CRLF, 4); | |
| if(pos==STRING_NOT_FOUND || pos<1) { | |
| throw Exception("http.response", | |
| &connect_string, | |
| "bad response from host - no headers found"); | |
| } | |
| const String& header_block=response.mid(0, pos); | |
| const String& raw_body=response.mid(pos+4, response.length()); | |
| 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); | |
| 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=Charset::transcode( | |
| String::C(raw_body.cstrm()/*must be modifiable*/, raw_body.length()), | |
| *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 %lu bytes count not in [0..%lu] 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}; | |
| #ifdef PA_HTTP | |
| if(file_spec.starts_with("http://")) { | |
| // fail on read problem | |
| File_read_http_result http=file_read_http(charsets, file_spec, params); | |
| result.success=true; | |
| result.str=http.str; | |
| result.length=http.length; | |
| result.headers=http.headers; | |
| } else { | |
| #endif | |
| 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, "\xEB\xBB\xBF", 3)==0) { | |
| result.str=in+3; result.length-=3;// skip prefix | |
| } | |
| } | |
| fix_line_breaks((char *)(result.str), result.length); | |
| // note: after fixing | |
| ((char*&)(result.str))[result.length]=0; | |
| } | |
| 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; | |
| // first open, next stat: | |
| // 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(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(...) { | |
| unlock(f);close(f); | |
| if(fail_on_read_problem) | |
| rethrow; | |
| return false; | |
| } | |
| 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; | |
| } | |
| } | |
| 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 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?lock_exclusive_blocking(f):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 | |
| 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 <virtan@rotabanner.com> for discovering] | |
| #endif | |
| 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<File_write_action_info *>(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); | |
| } | |
| } | |
| 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_read_problem) { | |
| const char* fname=file_spec.cstr(String::L_FILE_SPEC); | |
| if(unlink(fname)!=0) | |
| if(fail_on_read_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 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; | |
| if(result) { | |
| *row_ref=strchr(result, delim); | |
| if(*row_ref) | |
| *((*row_ref)++)=0; | |
| else if(!*result) | |
| return 0; | |
| } | |
| return result; | |
| } | |
| char* lsplit(char* string, char delim) { | |
| if(string) { | |
| char* v=strchr(string, delim); | |
| if(v) { | |
| *v=0; | |
| return v+1; | |
| } | |
| } | |
| return 0; | |
| } | |
| 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) { | |
| if(string) { | |
| char* v=strrchr(string, delim); | |
| if(v) { | |
| *v=0; | |
| return v+1; | |
| } | |
| } | |
| return NULL; | |
| } | |
| /// @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")) | |
| size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value); | |
| else | |
| size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value); | |
| else | |
| size=snprintf(local_buf, sizeof(local_buf), fmt, value); | |
| else | |
| size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value); | |
| return pa_strdup(local_buf, size); | |
| } | |
| size_t stdout_write(const void *buf, size_t size) { | |
| #ifdef WIN32 | |
| do{ | |
| 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); | |
| return size; | |
| #else | |
| return fwrite(buf, 1, size, stdout); | |
| #endif | |
| } | |
| 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; | |
| int srcPos=0; | |
| int dstPos=0; | |
| while(srcPos < len) { | |
| int ch=cp[srcPos]; | |
| switch(escapeState) { | |
| case EscapeRest: | |
| if(ch=='%') { | |
| escapeState=EscapeFirst; | |
| } else if(ch=='+') { | |
| s[dstPos++]=' '; | |
| } else { | |
| s[dstPos++]=ch; | |
| } | |
| break; | |
| case EscapeFirst: | |
| escapedValue=hex_value[ch] << 4; | |
| escapeState=EscapeSecond; | |
| break; | |
| case EscapeSecond: | |
| escapedValue +=hex_value[ch]; | |
| s[dstPos++]=escapedValue; | |
| escapeState=EscapeRest; | |
| break; | |
| } | |
| srcPos++; | |
| } | |
| s[dstPos]=0; | |
| return s; | |
| } | |
| #ifdef WIN32 | #ifdef WIN32 |
| void back_slashes_to_slashes(char* s) { | |
| if(s) | |
| for(; *s; s++) | |
| if(*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; | |
| } | |
| } | |
| int __vsnprintf(char *b, size_t s, const char *f, va_list l) { | |
| int r=_vsnprintf(b, --s, f, l); | /// must be last in this file |
| b[s]=0; | #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; | |
| #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(r>s) | |
| r=s; | |
| #endif | |
| b[r]=0; | |
| return r; | return r; |
| } | } |
| int __snprintf(char *b, size_t s, const char *f, ...) { | |
| int __snprintf(char* b, size_t s, const char* f, ...) { | |
| va_list l; | va_list l; |
| va_start(l, f); | va_start(l, f); |
| int r=__vsnprintf(b, s, f, l); | int r=__vsnprintf(b, s, f, l); |
| va_end(l); | va_end(l); |
| return r; | return r; |
| } | } |
| #endif | int pa_sleep(unsigned long secs, unsigned long usecs) { |
| for (; usecs >= 1000000; ++secs, usecs -= 1000000); | |
| char *file_read(Pool& pool, char *fname, bool fail_on_read_problem) { | |
| int f; | |
| struct stat finfo; | |
| if (fname && !stat(fname,&finfo) && (f=open(fname,O_RDONLY | |
| #ifdef WIN32 | #ifdef WIN32 |
| |O_TEXT | Sleep(secs * 1000 + usecs / 1000); |
| return 0; | |
| #else | |
| struct timeval t; | |
| t.tv_sec = secs; | |
| t.tv_usec = usecs; | |
| return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0); | |
| #endif | #endif |
| ))>=0){ | |
| /*if(exclusive) | |
| flock(f, LOCK_EX);*/ | |
| char *result=static_cast<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) | |
| POOL_THROW(0,0, | |
| 0, | |
| "use: can not read '%s' file", fname); | |
| return NULL; | |
| } | } |