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| version 1.127, 2002/11/25 14:57:33 | version 1.144, 2003/01/23 08:20:39 |
|---|---|
| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: commonly functions. | Parser: commonly functions. |
| Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) | Copyright(c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| */ | */ |
| Line 12 static const char* IDENT_COMMON_C="$Date | Line 12 static const char* IDENT_COMMON_C="$Date |
| #include "pa_globals.h" | #include "pa_globals.h" |
| #include "pa_hash.h" | #include "pa_hash.h" |
| #include "pa_vstring.h" | #include "pa_vstring.h" |
| #include "pa_vdate.h" | |
| #ifdef WIN32 | #ifdef WIN32 |
| # include <windows.h> | # include <windows.h> |
| Line 28 static const char* IDENT_COMMON_C="$Date | Line 29 static const char* IDENT_COMMON_C="$Date |
| # define _O_BINARY 0 | # define _O_BINARY 0 |
| #endif | #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 | // locking constants |
| #ifdef HAVE_FLOCK | #ifdef HAVE_FLOCK |
| Line 76 static int unlock(int fd) { FLOCK(F_TLOC | Line 87 static int unlock(int fd) { FLOCK(F_TLOC |
| #define DEFAULT_USER_AGENT "parser3" | #define DEFAULT_USER_AGENT "parser3" |
| static char* strnchr(char* buf, size_t size, char c) { | |
| // sanity check | |
| if(!buf) | |
| return 0; | |
| for(; size-->0; buf++) { | |
| if(*buf==c) | |
| return buf; | |
| } | |
| return 0; | |
| } | |
| void fix_line_breaks(char* buf, size_t& size) { | void fix_line_breaks(char* buf, size_t& size) { |
| if(size==0) | |
| return; | |
| //_asm int 3; | //_asm int 3; |
| const char* const eob=buf+size; | const char* const eob=buf+size; |
| char* dest=buf; | char* dest=buf; |
| // fix DOS: \r\n -> \n | // fix DOS: \r\n -> \n |
| // fix Macintosh: \r -> \n | // fix Macintosh: \r -> \n |
| char* bol=buf; | char* bol=buf; |
| while(char* eol=strnchr(bol, eob -bol, '\r')) { | while(char* eol=(char*)memchr(bol, '\r', eob -bol)) { |
| size_t len=eol-bol; | size_t len=eol-bol; |
| if(dest!=bol) | if(dest!=bol) |
| memcpy(dest, bol, len); | memcpy(dest, bol, len); |
| Line 139 static bool set_addr(struct sockaddr_in | Line 139 static bool set_addr(struct sockaddr_in |
| return true; | return true; |
| } | } |
| static void http_read_response(String& response, int sock){ | static int http_read_response(String& response, int sock, bool fail_on_status_ne_200){ |
| const String* status_code=0; | |
| ssize_t EOLat=0; | |
| while(true) { | while(true) { |
| char *buf=(char *)response.pool().malloc(MAX_STRING); | char *buf=(char *)response.pool().malloc(MAX_STRING); |
| ssize_t size=recv(sock, buf, MAX_STRING, 0); | ssize_t size=recv(sock, buf, MAX_STRING, 0); |
| if(size<=0) | if(size<=0) |
| break; | break; |
| response.APPEND_TAINTED(buf, size, "http response", 0); | response.APPEND_TAINTED(buf, size, "remote HTTP server response", 0); |
| } | if(!status_code && (EOLat=response.pos("\r\n", 2))>=0) { // checking status in first response |
| const String& status_line=response.mid(0, (size_t)EOLat); | |
| Array astatus(response.pool()); | |
| size_t pos_after_ref=0; status_line.split(astatus, &pos_after_ref, " ", 1); | |
| status_code=astatus.get_string(1); | |
| if(fail_on_status_ne_200 && *status_code!="200") | |
| throw Exception("http.status", | |
| status_code, | |
| "invalid HTTP response status"); | |
| } | |
| } | |
| if(status_code) | |
| return status_code->as_int(); | |
| else | |
| throw Exception("http.response", | |
| 0, | |
| "bad response from host - no status found (size=%lu)", response.size()); | |
| } | } |
| /* ********************** request *************************** */ | /* ********************** request *************************** */ |
| Line 162 static void timeout_handler(int sig){ | Line 181 static void timeout_handler(int sig){ |
| } | } |
| #endif | #endif |
| static void http_request(String& response, | static int http_request(String& response, |
| const String *origin_string, | const String *origin_string, |
| const char* host, int port, | const char* host, int port, |
| const char* request, | const char* request, |
| int timeout){ | int timeout, |
| bool fail_on_status_ne_200){ | |
| if(!host) | if(!host) |
| throw Exception("http.host", | throw Exception("http.host", |
| origin_string, | origin_string, |
| Line 177 static void http_request(String& respons | Line 197 static void http_request(String& respons |
| #endif | #endif |
| int sock=-1; | int sock=-1; |
| try { | try { |
| int result; | |
| #ifdef WE_CAN_USE_ALARM | #ifdef WE_CAN_USE_ALARM |
| if(sigsetjmp(timeout_env, 1)) | if(sigsetjmp(timeout_env, 1)) |
| throw Exception("http.timeout", | throw Exception("http.timeout", |
| Line 206 static void http_request(String& respons | Line 227 static void http_request(String& respons |
| origin_string, | origin_string, |
| "error sending request: %s (%d)", strerror(errno), errno); | "error sending request: %s (%d)", strerror(errno), errno); |
| http_read_response(response, sock); | result=http_read_response(response, sock, fail_on_status_ne_200); |
| if(sock>=0) | closesocket(sock); |
| closesocket(sock); | |
| #ifdef WE_CAN_USE_ALARM | #ifdef WE_CAN_USE_ALARM |
| alarm(0); | |
| } | } |
| #endif | #endif |
| return result; | |
| } catch(...) { | } catch(...) { |
| if(sock>=0) | if(sock>=0) |
| closesocket(sock); | closesocket(sock); |
| Line 233 static void http_pass_header(const Hash: | Line 255 static void http_pass_header(const Hash: |
| Http_pass_header_info& i=*static_cast<Http_pass_header_info *>(info); | Http_pass_header_info& i=*static_cast<Http_pass_header_info *>(info); |
| Pool& pool=i.request->pool(); | Pool& pool=i.request->pool(); |
| *(i.request)<<key<<": "<<*(static_cast<Value *>(value))->get_string()<<"\n"; | *(i.request)<<key<<": " |
| << attributed_meaning_to_string(*static_cast<Value *>(value), String::UL_HTTP_HEADER, false) | |
| <<"\n"; | |
| if(key.change_case(pool, String::CC_UPPER)=="USER-AGENT") | if(key.change_case(pool, String::CC_UPPER)=="USER-AGENT") |
| i.user_agent_specified=true; | i.user_agent_specified=true; |
| } | } |
| Line 242 static void file_read_http(Pool& pool, c | Line 266 static void file_read_http(Pool& pool, c |
| void*& data, size_t& data_size, | void*& data, size_t& data_size, |
| Hash *options=0, Hash** out_fields=0) { | Hash *options=0, Hash** out_fields=0) { |
| char host[MAX_STRING]; | char host[MAX_STRING]; |
| char* uri; | const char* uri; |
| int port; | int port; |
| const char* method="GET"; | const char* method="GET"; |
| int timeout=2; | int timeout=2; |
| bool fail_on_status_ne_200=true; | |
| Value *vheaders=0; | Value *vheaders=0; |
| char* connect_string=file_spec.cstr(String::UL_UNSPECIFIED); | String& connect_string=*new(pool) String(pool); // must not be local [exception may be reported outside] |
| if(strncmp(connect_string, "http://", 7)!=0) | // not in ^sql{... UL_SQL ...} spirit, but closer to ^file::load one |
| connect_string.append(file_spec, String::UL_URI); // tainted pieces -> URI pieces | |
| char* connect_string_cstr=connect_string.cstr(String::UL_UNSPECIFIED); | |
| if(strncmp(connect_string_cstr, "http://", 7)!=0) | |
| throw Exception(0, | throw Exception(0, |
| &file_spec, | &connect_string, |
| "does not start with http://"); //never | "does not start with http://"); //never |
| connect_string+=7; | connect_string_cstr+=7; |
| strncpy(host, connect_string, sizeof(host)-1); host[sizeof(host)-1]=0; | strncpy(host, connect_string_cstr, sizeof(host)-1); host[sizeof(host)-1]=0; |
| char* host_uri=lsplit(host, '/'); | char* host_uri=lsplit(host, '/'); |
| uri=host_uri?connect_string+(host_uri-1-host):"/"; | uri=host_uri?connect_string_cstr+(host_uri-1-host):"/"; |
| char* port_cstr=lsplit(host, ':'); | char* port_cstr=lsplit(host, ':'); |
| char* error_pos=0; | char* error_pos=0; |
| port=port_cstr?strtol(port_cstr, &error_pos, 0):80; | port=port_cstr?strtol(port_cstr, &error_pos, 0):80; |
| Line 275 static void file_read_http(Pool& pool, c | Line 304 static void file_read_http(Pool& pool, c |
| if(vheaders=static_cast<Value *>(options->get(*http_headers_name))) { | if(vheaders=static_cast<Value *>(options->get(*http_headers_name))) { |
| valid_options++; | valid_options++; |
| } | } |
| if(Value *vany_status=static_cast<Value *>(options->get(*http_any_status_name))) { | |
| valid_options++; | |
| fail_on_status_ne_200=!vany_status->as_bool(); | |
| } | |
| if(valid_options!=options->size()) | if(valid_options!=options->size()) |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| 0, | 0, |
| "invalid option passed"); | "invalid option passed"); |
| } | } |
| //making request | //making request |
| String request(pool); | String request(pool); |
| request<< method <<" "<< uri <<" HTTP/1.0\nHost: "<< host<<"\n"; | request<< method <<" "<< uri <<" HTTP/1.0\nHost: "<< host<<"\n"; |
| bool user_agent_specified=false; | bool user_agent_specified=false; |
| if(vheaders && !vheaders->is_string()) { // allow empty | if(vheaders && !vheaders->is_string()) { // allow empty |
| if(Hash *headers=vheaders->get_hash(&file_spec)) { | if(Hash *headers=vheaders->get_hash(&connect_string)) { |
| Http_pass_header_info info={&request}; | Http_pass_header_info info={&request}; |
| headers->for_each(http_pass_header, &info); | headers->for_each(http_pass_header, &info); |
| user_agent_specified=info.user_agent_specified; | user_agent_specified=info.user_agent_specified; |
| } else | } else |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| &file_spec, | &connect_string, |
| "headers param must be hash"); | "headers param must be hash"); |
| }; | }; |
| if(!user_agent_specified) // defaulting | if(!user_agent_specified) // defaulting |
| Line 301 static void file_read_http(Pool& pool, c | Line 335 static void file_read_http(Pool& pool, c |
| //sending request | //sending request |
| String response(pool); | String response(pool); |
| http_request(response, | int status_code=http_request(response, |
| &file_spec, host, port, request.cstr(String::UL_UNSPECIFIED), timeout); | &connect_string, host, port, request.cstr(String::UL_UNSPECIFIED), |
| timeout, fail_on_status_ne_200); | |
| //processing results | //processing results |
| int pos=response.pos("\r\n\r\n", 4); | int pos=response.pos("\r\n\r\n", 4); |
| if(pos<1){ | if(pos<1){ |
| throw Exception("http.response", | throw Exception("http.response", |
| &file_spec, | &connect_string, |
| "bad response from host - no headers found"); | "bad response from host - no headers found"); |
| } | } |
| String header_block=response.mid(0, pos); | String header_block=response.mid(0, pos); |
| Line 319 static void file_read_http(Pool& pool, c | Line 354 static void file_read_http(Pool& pool, c |
| size_t pos_after_ref=0; | size_t pos_after_ref=0; |
| header_block.split(aheaders, &pos_after_ref, "\r\n", 2); | header_block.split(aheaders, &pos_after_ref, "\r\n", 2); |
| //processing status code | |
| const String *status_line=aheaders.get_string(0); | |
| if(!status_line){ | |
| throw Exception("http.response", | |
| &file_spec, | |
| "bad response from host - no status line "); | |
| } | |
| //processing headers | //processing headers |
| Array astatus(pool); | |
| pos_after_ref=0; | |
| status_line->split(astatus, &pos_after_ref, " ", 1); | |
| const String * status_code=astatus.get_string(1); | |
| for(int i=1;i<aheaders.size();i++) { | for(int i=1;i<aheaders.size();i++) { |
| if(const String *line=aheaders.get_string(i)) { | if(const String *line=aheaders.get_string(i)) { |
| pos=line->pos(": ", 2); | pos=line->pos(": ", 2); |
| if(pos<1) | if(pos<1) |
| throw Exception("http.response", | throw Exception("http.response", |
| &file_spec, | &connect_string, |
| "bad response from host - bad header \"%s\"", line->cstr()); | "bad response from host - bad header \"%s\"", line->cstr()); |
| headers.put(line->mid(0, pos), new(pool) VString(line->mid(pos+2, line->size()))); | headers.put( |
| line->mid(0, pos).change_case(pool, String::CC_UPPER), | |
| new(pool) VString(line->mid(pos+2, line->size()))); | |
| } else | } else |
| throw Exception("http.response", | throw Exception("http.response", |
| &file_spec, | &connect_string, |
| "bad response from host - bad headers \"%s\"", header_block.cstr()); | "bad response from host - bad headers \"%s\"", header_block.cstr()); |
| } | } |
| // output response | // output response |
| data=body.cstr(); data_size=body.size(); | data=body.cstr(); data_size=body.size(); |
| if(out_fields) { | if(out_fields) { |
| headers.put(*file_status_name, new(pool) VString(*status_code)); | headers.put(*file_status_name, new(pool) VInt(pool, status_code)); |
| *out_fields=&headers; | *out_fields=&headers; |
| } | } |
| } | } |
| Line 402 bool file_read(Pool& pool, const String& | Line 427 bool file_read(Pool& pool, const String& |
| } | } |
| if(result && as_text) { | if(result && as_text) { |
| // UTF-8 signature: EF BB BF | |
| if(data_size>=3) { | |
| char *in=(char *)data; | |
| if((in[0] == '\xEF') && (in[1] == '\xBB') && | |
| (in[2] == '\xBF')) { | |
| data=in+3; data_size-=3;// skip prefix | |
| } | |
| } | |
| fix_line_breaks((char *)(data), data_size); | fix_line_breaks((char *)(data), data_size); |
| // note: after fixing | // note: after fixing |
| ((char*&)(data))[data_size]=0; | ((char*&)(data))[data_size]=0; |
| Line 441 bool file_read_action_under_lock(Pool& p | Line 475 bool file_read_action_under_lock(Pool& p |
| "stat failed: %s (%d), actual filename '%s'", | "stat failed: %s (%d), actual filename '%s'", |
| strerror(errno), errno, fname); | strerror(errno), errno, fname); |
| #ifdef NO_FOREIGN_GROUP_FILES | #ifdef PA_SAFE_MODE |
| if(finfo.st_gid/*foreign?*/!=getegid()) { | if(finfo.st_uid/*foreign?*/!=geteuid() |
| && finfo.st_gid/*foreign?*/!=getegid()) | |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| &file_spec, | &file_spec, |
| "parser reading files of foreign group disabled [recompile parser without --disable-foreign-group-files configure option], actual filename '%s'", | "parser is in safe mode: reading files of foreign group and user disabled [recompile parser with --disable-safe-mode configure option], actual filename '%s'", |
| fname); | fname); |
| #endif | #endif |
| Line 493 bool file_write_action_under_lock( | Line 528 bool file_write_action_under_lock( |
| if((f=open(fname, | if((f=open(fname, |
| O_CREAT|O_RDWR | O_CREAT|O_RDWR |
| |(as_text?_O_TEXT:_O_BINARY) | |(as_text?_O_TEXT:_O_BINARY) |
| |(do_append?O_APPEND:0), 0664))>=0) { | |(do_append?O_APPEND:PA_O_TRUNC), 0664))>=0) { |
| if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) { | if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) { |
| Exception e("file.lock", | Exception e("file.lock", |
| &file_spec, | &file_spec, |
| Line 508 bool file_write_action_under_lock( | Line 543 bool file_write_action_under_lock( |
| try { | try { |
| action(f, context); | action(f, context); |
| } catch(...) { | } catch(...) { |
| #ifdef HAVE_FTRUNCATE | |
| if(!do_append) | if(!do_append) |
| ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower | ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower |
| #endif | |
| unlock(f);close(f); | unlock(f);close(f); |
| /*re*/throw; | /*re*/throw; |
| } | } |
| #ifdef HAVE_FTRUNCATE | |
| if(!do_append) | 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] | 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); | unlock(f);close(f); |
| return true; | return true; |
| } else | } else |
| Line 912 int pa_sleep(unsigned long secs, unsigne | Line 951 int pa_sleep(unsigned long secs, unsigne |
| return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0); | return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0); |
| #endif | #endif |
| } | } |
| // attributed meaning | |
| static size_t date_attribute(const VDate& vdate, char *buf, size_t buf_size) { | |
| const char month_names[12][4]={ | |
| "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"}; | |
| const char days[7][4]={ | |
| "Sun","Mon","Tue","Wed","Thu","Fri","Sat"}; | |
| time_t when=vdate.get_time(); | |
| struct tm *tms=gmtime(&when); | |
| if(!tms) | |
| throw Exception(0, | |
| 0, | |
| "bad time in attribute value (seconds from epoch=%ld)", when); | |
| return snprintf(buf, MAX_STRING, "%s, %.2d-%s-%.4d %.2d:%.2d:%.2d GMT", | |
| days[tms->tm_wday], | |
| tms->tm_mday,month_names[tms->tm_mon],tms->tm_year+1900, | |
| tms->tm_hour,tms->tm_min,tms->tm_sec); | |
| } | |
| static void append_attribute_meaning(String& result, | |
| Value& value, String::Untaint_lang lang, bool forced) { | |
| if(const String *string=value.get_string()) | |
| result.append(string->join_chains(result.pool(), 0), lang, forced); | |
| else | |
| if(Value *vdate=value.as(VDATE_TYPE, false)) { | |
| char *buf=(char *)result.malloc(MAX_STRING); | |
| size_t size=date_attribute(*static_cast<VDate *>(vdate), | |
| buf, MAX_STRING); | |
| result.APPEND_CLEAN(buf, size, "converted from date", 0); | |
| } else | |
| throw Exception("parser.runtime", | |
| &result, | |
| "trying to append here neither string nor date (%s)", | |
| value.type()); | |
| } | |
| #ifndef DOXYGEN | |
| struct Attributed_meaning_info { | |
| String *header; // header line being constructed | |
| String::Untaint_lang lang; // language in which to append to that line | |
| bool forced; // do they force that lang? | |
| }; | |
| #endif | |
| static void append_attribute_subattribute(const Hash::Key& akey, Hash::Val *avalue, | |
| void *info) { | |
| if(akey==VALUE_NAME) | |
| return; | |
| Attributed_meaning_info& ami=*static_cast<Attributed_meaning_info *>(info); | |
| // ...; charset=windows1251 | |
| *ami.header << "; "; | |
| ami.header->append(akey, ami.lang, ami.forced); | |
| *ami.header << "="; | |
| append_attribute_meaning(*ami.header, *static_cast<Value *>(avalue), ami.lang, ami.forced); | |
| } | |
| const String& attributed_meaning_to_string(Value& meaning, | |
| String::Untaint_lang lang, bool forced) { | |
| String &result=*new(meaning.pool()) String(meaning.pool()); | |
| if(Hash *hash=meaning.get_hash(0)) { | |
| // $value(value) $subattribute(subattribute value) | |
| if(Value *value=static_cast<Value *>(hash->get(*value_name))) | |
| append_attribute_meaning(result, *value, lang, forced); | |
| Attributed_meaning_info attributed_meaning_info={&result, lang}; | |
| hash->for_each(append_attribute_subattribute, &attributed_meaning_info); | |
| } else // result value | |
| append_attribute_meaning(result, meaning, lang, forced); | |
| return result; | |
| } |