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| version 1.135, 2002/11/29 08:06:59 | version 1.146, 2003/03/21 07:07:06 |
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| 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 29 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 77 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 140 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){ |
| bool check_status=true; | const String* status_code=0; |
| ssize_t EOLat=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); |
| Line 149 static void http_read_response(String& r | Line 148 static void http_read_response(String& r |
| if(size<=0) | if(size<=0) |
| break; | break; |
| response.APPEND_TAINTED(buf, size, "remote HTTP server response", 0); | response.APPEND_TAINTED(buf, size, "remote HTTP server response", 0); |
| if(check_status && (EOLat=response.pos("\r\n", 2))>=0) { // checking status in first response | if(!status_code && (EOLat=response.pos("\r\n", 2))>=0) { // checking status in first response |
| check_status=false; | |
| const String& status_line=response.mid(0, (size_t)EOLat); | const String& status_line=response.mid(0, (size_t)EOLat); |
| Array astatus(response.pool()); | Array astatus(response.pool()); |
| size_t pos_after_ref=0; status_line.split(astatus, &pos_after_ref, " ", 1); | size_t pos_after_ref=0; status_line.split(astatus, &pos_after_ref, " ", 1); |
| const String* status_code=astatus.get_string(1); | status_code=astatus.get_string(1); |
| if(!status_code || *status_code!="200") | if(fail_on_status_ne_200 && *status_code!="200") |
| throw Exception("http.status", | throw Exception("http.status", |
| status_code, | status_code, |
| "invalid HTTP response status"); | "invalid HTTP response status"); |
| } | } |
| } | } |
| if(check_status) | if(status_code) |
| return status_code->as_int(); | |
| else | |
| throw Exception("http.response", | throw Exception("http.response", |
| 0, | 0, |
| "bad response from host - no status found (size=%lu)", response.size()); | "bad response from host - no status found (size=%lu)", response.size()); |
| Line 172 static void http_read_response(String& r | Line 171 static void http_read_response(String& r |
| /* ********************** request *************************** */ | /* ********************** request *************************** */ |
| #if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP) | #if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP) |
| # define WE_CAN_USE_ALARM | # define PA_USE_ALARM |
| #endif | #endif |
| #ifdef WE_CAN_USE_ALARM | #ifdef PA_USE_ALARM |
| static sigjmp_buf timeout_env; | static sigjmp_buf timeout_env; |
| static void timeout_handler(int sig){ | static void timeout_handler(int sig){ |
| siglongjmp(timeout_env, 1); | siglongjmp(timeout_env, 1); |
| } | } |
| #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, |
| "zero hostname"); //never | "zero hostname"); //never |
| #ifdef WE_CAN_USE_ALARM | #ifdef PA_USE_ALARM |
| signal(SIGALRM, timeout_handler); | signal(SIGALRM, timeout_handler); |
| #endif | #endif |
| int sock=-1; | int sock=-1; |
| try { | #ifdef PA_USE_ALARM |
| #ifdef WE_CAN_USE_ALARM | if(sigsetjmp(timeout_env, 1)) { |
| if(sigsetjmp(timeout_env, 1)) | // stupid gcc [2.95.4] generated bad code |
| throw Exception("http.timeout", | // which failed to handle sigsetjmp+throw: crashed inside of pre-throw code. |
| origin_string, | // rewritten simplier [though duplicating closesocket code] |
| "timeout occured while retrieving document"); | if(sock>=0) |
| else { | closesocket(sock); |
| alarm(timeout); | throw Exception("http.timeout", |
| origin_string, | |
| "timeout occured while retrieving document"); | |
| return 0; // never | |
| } else { | |
| alarm(timeout); | |
| #endif | #endif |
| try { | |
| int result; | |
| struct sockaddr_in dest; | struct sockaddr_in dest; |
| if(!set_addr(&dest, host, port)) | if(!set_addr(&dest, host, port)) |
| throw Exception("http.host", | throw Exception("http.host", |
| origin_string, | origin_string, |
| "can not resolve hostname \"%s\"", host); | "can not resolve hostname \"%s\"", host); |
| Line 226 static void http_request(String& respons | Line 233 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); |
| closesocket(sock); | |
| #ifdef PA_USE_ALARM | |
| alarm(0); | |
| #endif | |
| } catch(...) { | |
| #ifdef PA_USE_ALARM | |
| alarm(0); | |
| #endif | |
| if(sock>=0) | if(sock>=0) |
| closesocket(sock); | closesocket(sock); |
| #ifdef WE_CAN_USE_ALARM | /*re*/throw; |
| } | } |
| #endif | return result; |
| } catch(...) { | |
| if(sock>=0) | |
| closesocket(sock); | |
| #ifdef WE_CAN_USE_ALARM | |
| alarm(0); | |
| #endif | |
| /*re*/throw; | |
| } | } |
| } | } |
| Line 254 static void http_pass_header(const Hash: | Line 262 static void http_pass_header(const Hash: |
| Pool& pool=i.request->pool(); | Pool& pool=i.request->pool(); |
| *(i.request)<<key<<": " | *(i.request)<<key<<": " |
| << attributed_meaning_to_string(*static_cast<Value *>(value), String::UL_URI) | << attributed_meaning_to_string(*static_cast<Value *>(value), String::UL_HTTP_HEADER, false) |
| <<"\n"; | <<"\n"; |
| if(key.change_case(pool, String::CC_UPPER)=="USER-AGENT") | if(key.change_case(pool, String::CC_UPPER)=="USER-AGENT") |
| Line 268 static void file_read_http(Pool& pool, c | Line 276 static void file_read_http(Pool& pool, c |
| 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; |
| String connect_string(pool); | String& connect_string=*new(pool) String(pool); // must not be local [exception may be reported outside] |
| // not in ^sql{... UL_SQL ...} spirit, but closer to ^file::load one | // not in ^sql{... UL_SQL ...} spirit, but closer to ^file::load one |
| connect_string.append(file_spec, String::UL_URI); // tainted pieces -> URI pieces | connect_string.append(file_spec, String::UL_URI); // tainted pieces -> URI pieces |
| Line 301 static void file_read_http(Pool& pool, c | Line 310 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, |
| Line 327 static void file_read_http(Pool& pool, c | Line 341 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, |
| &connect_string, 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); |
| Line 345 static void file_read_http(Pool& pool, c | Line 360 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", | |
| &connect_string, | |
| "bad response from host - no status line "); | |
| } | |
| //processing headers | //processing headers |
| 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)) { |
| Line 372 static void file_read_http(Pool& pool, c | Line 380 static void file_read_http(Pool& pool, c |
| // 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) VInt(pool, status_code)); | |
| *out_fields=&headers; | *out_fields=&headers; |
| } | |
| } | } |
| #ifndef DOXYGEN | #ifndef DOXYGEN |
| Line 471 bool file_read_action_under_lock(Pool& p | Line 481 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 523 bool file_write_action_under_lock( | Line 534 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 538 bool file_write_action_under_lock( | Line 549 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 964 static size_t date_attribute(const VDate | Line 979 static size_t date_attribute(const VDate |
| tms->tm_hour,tms->tm_min,tms->tm_sec); | tms->tm_hour,tms->tm_min,tms->tm_sec); |
| } | } |
| static void append_attribute_meaning(String& result, | static void append_attribute_meaning(String& result, |
| Value& value, String::Untaint_lang lang) { | Value& value, String::Untaint_lang lang, bool forced) { |
| if(const String *string=value.get_string()) | if(const String *string=value.get_string()) |
| result.append(string->join_chains(result.pool(), 0), lang, true); | result.append(string->join_chains(result.pool(), 0), lang, forced); |
| else | else |
| if(Value *vdate=value.as(VDATE_TYPE, false)) { | if(Value *vdate=value.as(VDATE_TYPE, false)) { |
| char *buf=(char *)result.malloc(MAX_STRING); | char *buf=(char *)result.malloc(MAX_STRING); |
| Line 984 static void append_attribute_meaning(Str | Line 999 static void append_attribute_meaning(Str |
| struct Attributed_meaning_info { | struct Attributed_meaning_info { |
| String *header; // header line being constructed | String *header; // header line being constructed |
| String::Untaint_lang lang; // language in which to append to that line | String::Untaint_lang lang; // language in which to append to that line |
| bool forced; // do they force that lang? | |
| }; | }; |
| #endif | #endif |
| static void append_attribute_subattribute(const Hash::Key& akey, Hash::Val *avalue, | static void append_attribute_subattribute(const Hash::Key& akey, Hash::Val *avalue, |
| Line 995 static void append_attribute_subattribut | Line 1011 static void append_attribute_subattribut |
| // ...; charset=windows1251 | // ...; charset=windows1251 |
| *ami.header << "; "; | *ami.header << "; "; |
| ami.header->append(akey, ami.lang, true); | ami.header->append(akey, ami.lang, ami.forced); |
| *ami.header << "="; | *ami.header << "="; |
| append_attribute_meaning(*ami.header, *static_cast<Value *>(avalue), ami.lang); | append_attribute_meaning(*ami.header, *static_cast<Value *>(avalue), ami.lang, ami.forced); |
| } | } |
| const String& attributed_meaning_to_string(Value& meaning, | const String& attributed_meaning_to_string(Value& meaning, |
| String::Untaint_lang lang) { | String::Untaint_lang lang, bool forced) { |
| String &result=*new(meaning.pool()) String(meaning.pool()); | String &result=*new(meaning.pool()) String(meaning.pool()); |
| if(Hash *hash=meaning.get_hash(0)) { | if(Hash *hash=meaning.get_hash(0)) { |
| // $value(value) $subattribute(subattribute value) | // $value(value) $subattribute(subattribute value) |
| if(Value *value=static_cast<Value *>(hash->get(*value_name))) | if(Value *value=static_cast<Value *>(hash->get(*value_name))) |
| append_attribute_meaning(result, *value, lang); | append_attribute_meaning(result, *value, lang, forced); |
| Attributed_meaning_info attributed_meaning_info={&result, lang}; | Attributed_meaning_info attributed_meaning_info={&result, lang}; |
| hash->for_each(append_attribute_subattribute, &attributed_meaning_info); | hash->for_each(append_attribute_subattribute, &attributed_meaning_info); |
| } else // result value | } else // result value |
| append_attribute_meaning(result, meaning, lang); | append_attribute_meaning(result, meaning, lang, forced); |
| return result; | return result; |
| } | } |