--- parser3/src/targets/cgi/parser3.C 2001/03/13 17:54:14 1.2 +++ parser3/src/targets/cgi/parser3.C 2012/06/15 09:30:01 1.261 @@ -1,43 +1,810 @@ -/* - Parser - Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) - Author: Alexander Petrosyan (http://design.ru/paf) +/** @file + Parser: scripting and CGI main. - $Id: parser3.C,v 1.2 2001/03/13 17:54:14 paf Exp $ + Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com) + Author: Alexandr Petrosian (http://paf.design.ru) */ -#include "core.h" -#include "pa_request.h" +volatile const char * IDENT_PARSER3_C="$Id: parser3.C,v 1.261 2012/06/15 09:30:01 moko Exp $"; + +#include "pa_config_includes.h" + +#if _MSC_VER +# include +#endif + +#include "pa_sapi.h" +#include "classes.h" #include "pa_common.h" +#include "pa_request.h" +#include "pa_socks.h" +#include "pa_version.h" -int main(int argc, char *argv[]) { - Pool pool; - core(pool); +#ifdef WIN32 +# include +#endif + +// defines + +// comment remove me after debugging +//#define PA_DEBUG_CGI_ENTRY_EXIT "c:\\parser\\debug-parser3.log" + +#if _MSC_VER && !defined(_DEBUG) +# define PA_SUPPRESS_SYSTEM_EXCEPTION +#endif + +//#define DEBUG_MAILRECEIVE "mailreceive.eml" + +// consts + +#define REDIRECT_PREFIX "REDIRECT_" +#define PARSER_CONFIG_ENV_NAME "CGI_PARSER_CONFIG" +#define PARSER_LOG_ENV_NAME "CGI_PARSER_LOG" + +/// IIS refuses to read bigger chunks +const size_t READ_POST_CHUNK_SIZE=0x400*0x400; // 1M + +static const char* argv0; +static const char* config_filespec_cstr=0; +static bool fail_on_config_read_problem=true; + +static int args_skip=1; +static char** argv_all = NULL; + +static bool cgi; ///< we were started as CGI? +static bool mail_received=false; ///< we were started with -m option? [asked to parse incoming message to $mail:received] + +// for signal handlers +Request *request=0; +Request_info *request_info=0; +bool execution_canceled=false; + +// SAPI + +class SAPI_Info{} SAPI_info; + +static void log(const char* fmt, va_list args) { + bool opened=false; + FILE *f=0; + + const char* log_by_env=getenv(PARSER_LOG_ENV_NAME); + if(!log_by_env) + log_by_env=getenv(REDIRECT_PREFIX PARSER_LOG_ENV_NAME); + if(log_by_env) { + f=fopen(log_by_env, "at"); + opened=f!=0; + } +#ifdef PA_DEBUG_CGI_ENTRY_EXIT + f=fopen(PA_DEBUG_CGI_ENTRY_EXIT, "at"); + opened=f!=0; +#endif + + if(!opened && config_filespec_cstr) { + char beside_config_path[MAX_STRING]; + strncpy(beside_config_path, config_filespec_cstr, MAX_STRING-1); beside_config_path[MAX_STRING-1]=0; + if(!( + rsplit(beside_config_path, '/') || + rsplit(beside_config_path, '\\'))) { // strip filename + // no path, just filename + beside_config_path[0]='.'; beside_config_path[1]=0; + } + + char file_spec[MAX_STRING]; + snprintf(file_spec, MAX_STRING, + "%s/parser3.log", beside_config_path); + f=fopen(file_spec, "at"); + opened=f!=0; + } + // fallback to stderr + if(!opened) + f=stderr; + + // use no memory [so that we could log out-of-memory error] + setbuf(f, 0); // stderr stream is unbuffered by default, but still... + + // prefix + time_t t=time(0); + if(const char* stamp=ctime(&t)) { // never saw that + if(size_t len=strlen(stamp)) // saw once stamp being ="" + fprintf(f, "[%.*s] [%u] ", (int)len-1, stamp, + (unsigned int)getpid() + ); + } + // message + + char buf[MAX_LOG_STRING]; + size_t size=vsnprintf(buf, MAX_LOG_STRING, fmt, args); + size=remove_crlf(buf, buf+size); + fwrite(buf, size, 1, f); + + if(request_info) + fprintf(f, " [uri=%s, method=%s, cl=%lu]", + request_info->uri? request_info->uri: "", + request_info->method? request_info->method: "", + request_info->content_length); + else + fputs(" [no request info]", f); + + // newline + fputs("\n", f); + + if(opened) + fclose(f); + else + fflush(f); +} +#ifdef PA_DEBUG_CGI_ENTRY_EXIT +static void log(const char* fmt, ...) { + va_list args; + va_start(args,fmt); + log(fmt, args); + va_end(args); +} +#endif - bool cgi= - getenv("SERVER_SOFTWARE") || - getenv("SERVER_NAME") || - getenv("GATEWAY_INTERFACE") || - getenv("REQUEST_METHOD"); - - // TODO: ifdef WIN32 flip \\ to / - char *document_root="Y:/parser3/src/"; - char *page_filespec="Y:/parser3/src/test.p"; - - // request - Request request(pool, - cgi?String::Untaint_lang::HTML_TYPO:String::Untaint_lang::NO, // :) - document_root, - page_filespec - ); +// appends to parser3.log located beside my binary if openable, to stderr otherwize +void SAPI::log(SAPI_Info&, const char* fmt, ...) { + va_list args; + va_start(args,fmt); + ::log(fmt, args); + va_end(args); +} + +static void die_or_abort(const char* fmt, va_list args, bool write_core) { + // inform user + + char body[MAX_STRING]; + int content_length=vsnprintf(body, MAX_STRING, fmt, args); + + // prepare header + // let's be honest, that's bad we couldn't produce valid output + // capitalized headers passed for preventing malloc during capitalization + SAPI::add_header_attribute(SAPI_info, HTTP_STATUS_CAPITALIZED, "500"); + SAPI::add_header_attribute(SAPI_info, HTTP_CONTENT_TYPE_CAPITALIZED, "text/plain"); + // don't use 'format' function because it calls malloc + char content_length_cstr[MAX_NUMBER]; + snprintf(content_length_cstr, sizeof(content_length_cstr), "%u", content_length); + SAPI::add_header_attribute(SAPI_info, HTTP_CONTENT_LENGTH_CAPITALIZED, content_length_cstr); + + // send header + SAPI::send_header(SAPI_info); + + // body + SAPI::send_body(SAPI_info, body, content_length); + + // exit & try to produce core dump[unix] or invoke debugger[Win32 Debug version] + if(write_core) { +#if defined(WIN32) && !defined(_DEBUG) + // IIS with abort failes to show STDOUT, it just barks "abnormal program termination" + exit(1); +#else +#if _MSC_VER + _asm int 3; +#endif + abort(); +#endif + } + else + exit(1); +} + +void SAPI::die(const char* fmt, ...) { + va_list args; + + // logging first, can't log inside die_or_abort due to vsnprintf (bug #106) + va_start(args,fmt); + ::log(fmt, args); + va_end(args); + + va_start(args, fmt); + die_or_abort(fmt, args, false /*write core?*/); +// va_end(args); +} + +void SAPI::abort(const char* fmt, ...) { + va_list args; + + // logging first, can't log inside die_or_abort due to vsnprintf (bug #106) + va_start(args,fmt); + ::log(fmt, args); + va_end(args); + + va_start(args, fmt); + die_or_abort(fmt, args, true /*write core?*/); +// va_end(args); +} - bool error; - char *result=request.core(error); +char* SAPI::get_env(SAPI_Info& , const char* name) { + if(char *local=getenv(name)) + return pa_strdup(local); + else + return 0; +} + +const char* const *SAPI::environment(SAPI_Info&) { +#ifdef _MSC_VER + extern char **_environ; + return _environ; +#else + extern char **environ; + return environ; +#endif +} + +size_t SAPI::read_post(SAPI_Info& , char *buf, size_t max_bytes) { + size_t read_size=0; + do { + ssize_t chunk_size=read(fileno(stdin), + buf+read_size, min(READ_POST_CHUNK_SIZE, max_bytes-read_size)); + if(chunk_size<=0) + break; + read_size+=chunk_size; + } while(read_sizeconsole.was_used()) ) + printf("%s: %s\n", capitalize(dont_store_key), dont_store_value); +} - if(error) - printf("ERROR: %s", result); +/// @todo intelligent cache-control +void SAPI::send_header(SAPI_Info& ) { + if(cgi) { +// puts("expires: Fri, 23 Mar 2001 09:32:23 GMT"); + + // header | body delimiter + puts(""); + } +} + +size_t SAPI::send_body(SAPI_Info& , const void *buf, size_t size) { + return stdout_write(buf, size); +} + +// + +static void full_file_spec(const char* file_name, char *buf, size_t buf_size) { + if(file_name) + if(file_name[0]=='/' +#ifdef WIN32 + || file_name[0] && file_name[1]==':' +#endif + ) + strncpy(buf, file_name, buf_size); + else { + char cwd[MAX_STRING]; + snprintf(buf, buf_size, "%s/%s", getcwd(cwd, MAX_STRING) ? cwd : "", file_name); + } else - printf("%s", result); + buf[0]=0; +#ifdef WIN32 + back_slashes_to_slashes(buf); +#endif +} + +static void log_signal(const char* signal_name) { + if(request_info) + SAPI::log(SAPI_info, "%s received while %s. uri=%s, method=%s, cl=%u", + signal_name, + request?"executing code":"reading data", + request_info->uri, + request_info->method, + request_info->content_length); + else + SAPI::log(SAPI_info, "%s received before or after processing request", + signal_name); +} + +#ifdef SIGUSR1 +static void SIGUSR1_handler(int /*sig*/){ + log_signal("SIGUSR1"); +} +#endif + +#ifdef SIGPIPE +#define SIGPIPE_NAME "SIGPIPE" +static const String sigpipe_name(SIGPIPE_NAME); +static void SIGPIPE_handler(int /*sig*/){ + Value* sigpipe=0; + if(request) + sigpipe=request->main_class.get_element(sigpipe_name); + if(sigpipe && sigpipe->as_bool()) + log_signal(SIGPIPE_NAME); + + execution_canceled=true; + if(request) + request->set_interrupted(true); +} +#endif + +#ifdef WIN32 +const char* maybe_reconstruct_IIS_status_in_qs(const char* original) +{ + // 404;http://servername/page[?param=value...] + // ';' should be urlencoded by HTTP standard, so we shouldn't get it from browser + // and can consider that as an indication that this is IIS way to report errors + + if(original + && isdigit((unsigned char)original[0]) + && isdigit((unsigned char)original[1]) + && isdigit((unsigned char)original[2]) + && original[3]==';') + { + size_t original_len=strlen(original); + char* reconstructed=new(PointerFreeGC) char[original_len + +12/*IIS-STATUS=&*/ + +14/*IIS-DOCUMENT=&*/ + +1]; + char* cur=reconstructed; + memcpy(cur, "IIS-STATUS=", 11); cur+=11; + memcpy(cur, original, 3); cur+=3; + *cur++='&'; + + const char* qmark_at=strchr(original, '?'); + memcpy(cur, "IIS-DOCUMENT=", 13); cur+=13; + { + size_t value_len=(qmark_at? qmark_at-original: original_len)-4; + memcpy(cur, original+4, value_len); cur+=value_len; + } + + if(qmark_at) { + *cur++='&'; + strcpy(cur, qmark_at+1/*skip ? itself*/); + } else + *cur=0; + + return reconstructed; + } + + return original; +} +#endif + + +class RequestController { +public: + RequestController(Request* r){ + ::request=r; + } + ~RequestController(){ + ::request=0; + } +}; + + +/** +main workhorse + + @todo + IIS: remove trailing default-document[index.html] from $request.uri. + to do that we need to consult metabase, + wich is tested but seems slow. +*/ +static void real_parser_handler(const char* filespec_to_process, + const char* request_method, bool header_only) +{ + // init socks + pa_socks_init(); + + // init global variables + pa_globals_init(); + + if(!filespec_to_process || !*filespec_to_process) + SAPI::die("Parser/%s" +#ifdef PA_DEBUG_CGI_ENTRY_EXIT + " with entry/exit tracing" +#endif + , PARSER_VERSION); + + // Request info + Request_info request_info; memset(&request_info, 0, sizeof(request_info)); + char document_root_buf[MAX_STRING]; + if(cgi) { + if(const char* env_document_root=getenv("DOCUMENT_ROOT")) + request_info.document_root=env_document_root; + else if(const char* path_info=getenv("PATH_INFO")) { + // IIS + size_t len=min(sizeof(document_root_buf)-1, strlen(filespec_to_process)-strlen(path_info)); + memcpy(document_root_buf, filespec_to_process, len); document_root_buf[len]=0; + request_info.document_root=document_root_buf; + } else + throw Exception(PARSER_RUNTIME, + 0, + "CGI: no PATH_INFO defined(in reinventing DOCUMENT_ROOT)"); + } else { + full_file_spec("", document_root_buf, sizeof(document_root_buf)); + request_info.document_root=document_root_buf; + } + request_info.path_translated=filespec_to_process; + request_info.method=request_method ? request_method : "GET"; + const char* query_string= +#ifdef WIN32 + maybe_reconstruct_IIS_status_in_qs +#endif + (getenv("QUERY_STRING")); + request_info.query_string=query_string; + if(cgi) { + // few absolute obligatory + const char* path_info=getenv("PATH_INFO"); + if(!path_info) + SAPI::die("CGI: illegal call (missing PATH_INFO)"); + const char* script_name=getenv("SCRIPT_NAME"); + if(!script_name) + SAPI::die("CGI: illegal call (missing SCRIPT_NAME)"); + + const char* env_request_uri=getenv("REQUEST_URI"); + if(env_request_uri) + request_info.uri=env_request_uri; + else + if(query_string) { + char* reconstructed_uri=new(PointerFreeGC) char[ + strlen(path_info)+1/*'?'*/+ + strlen(query_string)+1/*0*/]; + strcpy(reconstructed_uri, path_info); + strcat(reconstructed_uri, "?"); + strcat(reconstructed_uri, query_string); + request_info.uri=reconstructed_uri; + } else + request_info.uri=path_info; + + if(env_request_uri) { // apache & others stuck to standards + /* + http://parser3/env.html?123 =OK + $request:uri=/env.html?123 + REQUEST_URI='/env.html?123' + SCRIPT_NAME='/cgi-bin/parser3' + PATH_INFO='/env.html' + + http://parser3/cgi-bin/parser3/env.html?123 =ERROR + $request:uri=/cgi-bin/parser3/env.html?123 + REQUEST_URI='/cgi-bin/parser3/env.html?123' + SCRIPT_NAME='/cgi-bin/parser3' + PATH_INFO='/env.html' + */ + size_t script_name_len=strlen(script_name); + size_t uri_len=strlen(env_request_uri); + if(strncmp(env_request_uri, script_name, script_name_len)==0 && + script_name_len != uri_len) // under IIS they are the same + SAPI::die("CGI: illegal call (1)"); + } else { // seen on IIS5 + /* + http://nestle/env.html?123 =OK + $request:uri=/env.html?123 + REQUEST_URI='' + SCRIPT_NAME='/env.html' + PATH_INFO='/env.html' + + http://nestle/cgi-bin/parser3.exe/env.html =ERROR + $request:uri=/env.html + REQUEST_URI='' + SCRIPT_NAME='/cgi-bin/parser3.exe' + PATH_INFO='/env.html' + */ + if(strcmp(script_name, path_info)!=0) + SAPI::die("CGI: illegal call (2)"); + } + } else + request_info.uri=""; + + request_info.content_type=getenv("CONTENT_TYPE"); + const char* content_length=getenv("CONTENT_LENGTH"); + request_info.content_length=(content_length?atoi(content_length):0); + request_info.cookie=getenv("HTTP_COOKIE"); + request_info.mail_received=mail_received; + + request_info.argv=argv_all; + request_info.args_skip=args_skip; + + // get request_info ptr for signal handlers + ::request_info=&request_info; + if(execution_canceled) + SAPI::die("Execution canceled"); + +#ifdef PA_DEBUG_CGI_ENTRY_EXIT + log("request_info: method=%s, uri=%s, q=%s, dr=%s, pt=%s, cookies=%s, cl=%u", + request_info.method, + request_info.uri, + request_info.query_string, + request_info.document_root, + request_info.path_translated, + request_info.cookie, + request_info.content_length); +#endif + + // prepare to process request + Request request(SAPI_info, request_info, + cgi ? String::Language(String::L_HTML|String::L_OPTIMIZE_BIT) : String::L_AS_IS); + + { + // get ::request ptr for signal handlers + RequestController rc(&request); + + char config_filespec_buf[MAX_STRING]; + if(!config_filespec_cstr) { + const char* config_by_env=getenv(PARSER_CONFIG_ENV_NAME); + if(!config_by_env) + config_by_env=getenv(REDIRECT_PREFIX PARSER_CONFIG_ENV_NAME); + if(config_by_env) + config_filespec_cstr=config_by_env; + else { + // beside by binary + char beside_binary_path[MAX_STRING]; + strncpy(beside_binary_path, argv0, MAX_STRING-1); beside_binary_path[MAX_STRING-1]=0; // filespec of my binary + if(!( + rsplit(beside_binary_path, '/') || + rsplit(beside_binary_path, '\\'))) { // strip filename + // no path, just filename + // @todo full path, not ./! + beside_binary_path[0]='.'; beside_binary_path[1]=0; + } + snprintf(config_filespec_buf, MAX_STRING, + "%s/%s", + beside_binary_path, AUTO_FILE_NAME); + config_filespec_cstr=config_filespec_buf; + fail_on_config_read_problem=entry_exists(config_filespec_cstr); + } + } + + // process the request + request.core( + config_filespec_cstr, fail_on_config_read_problem, + header_only); + + // ::request cleared in RequestController desctructor to prevent signal handlers from accessing invalid memory + } + + // finalize global variables + pa_globals_done(); + + // + pa_socks_done(); +} + +#ifdef PA_SUPPRESS_SYSTEM_EXCEPTION +static const Exception +call_real_parser_handler__do_PEH_return_it( + const char* filespec_to_process, + const char* request_method, bool header_only) +{ + try { + real_parser_handler( + filespec_to_process, + request_method, header_only); + } catch(const Exception& e) { + return e; + } + + return Exception(); +} +static void call_real_parser_handler__supress_system_exception( + const char* filespec_to_process, + const char* request_method, bool header_only) +{ + Exception parser_exception; + LPEXCEPTION_POINTERS system_exception=0; + + __try { + parser_exception=call_real_parser_handler__do_PEH_return_it( + filespec_to_process, + request_method, header_only); + } __except ( + (system_exception=GetExceptionInformation()), + EXCEPTION_EXECUTE_HANDLER) + { + + if(system_exception) + if(_EXCEPTION_RECORD *er=system_exception->ExceptionRecord) + throw Exception("system", + 0, + "0x%08X at 0x%08X", er->ExceptionCode, er->ExceptionAddress); + else + throw Exception("system", + 0, + ""); + else + throw Exception("system", + 0, + ""); + } + + if(parser_exception) + throw Exception(parser_exception); +} +#endif + +static void usage(const char* program) { + printf( + "Parser/%s\n" + "Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com)\n" + "Author: Alexandr Petrosian (http://paf.design.ru)\n" + "\n" + "Usage: %s [options] file\n" + "Options are:\n" +#ifdef WITH_MAILRECEIVE + " -m Parse mail, put received letter to $mail:received\n" +#endif + " -f config_file Use this config file (/path/to/auto.p)\n" + " -h Display usage information (this message)\n" + , PARSER_VERSION, + program); + exit(EINVAL); +} + +int main(int argc, char *argv[]) { +#ifdef PA_DEBUG_CGI_ENTRY_EXIT + log("main: entry"); +#endif + //_asm int 3; + GC_java_finalization=0; + +#ifndef PA_DEBUG_DISABLE_GC + // Dont collect unless explicitly requested + // this is quicker (~30% ), but less memory-efficient(~8%) + // so deciding for speed + GC_dont_gc=1; +#endif +/* + + Array test; + test+=3; + test+=4; +// int a=test.count(); + int i=0; + scanf("%d", &i); + int b=test.get(i); +// int b=test.get(10); + printf("%d", b);//test.count());*/ + +#ifdef SIGUSR1 + if(signal(SIGUSR1, SIGUSR1_handler)==SIG_ERR) + SAPI::die("Can not set handler for SIGUSR1"); +#endif +#ifdef SIGPIPE + if(signal(SIGPIPE, SIGPIPE_handler)==SIG_ERR) + SAPI::die("Can not set handler for SIGPIPE"); +#endif + + +#ifdef DEBUG_MAILRECEIVE + if(FILE *fake_in=fopen(DEBUG_MAILRECEIVE, "rt")) { + dup2(fake_in->_file, 0/*STDIN_FILENO*/); + } +#endif + +#ifdef _DEBUG + //_crtBreakAlloc=46; +#endif + argv_all=argv; + argv0=argv[0]; + + umask(2); + + // were we started as CGI? + cgi= + ( + getenv("SERVER_SOFTWARE") || + getenv("SERVER_NAME") || + getenv("GATEWAY_INTERFACE") || + getenv("REQUEST_METHOD") + ) + && !getenv("PARSER_VERSION"); + + char *raw_filespec_to_process; + if(cgi) { + raw_filespec_to_process=getenv("PATH_TRANSLATED"); + if(raw_filespec_to_process && !*raw_filespec_to_process) + raw_filespec_to_process=0; + } else { + int optind=1; + while(optind < argc){ + char *carg = argv[optind]; + if(carg[0] != '-') + break; + + for(size_t k = 1; k < strlen(carg); k++){ + char c = carg[k]; + switch (c) { + case 'h': + usage(argv[0]); + break; + case 'f': + if(optind < argc - 1){ + optind++; + config_filespec_cstr=argv[optind]; + } + break; +#ifdef WITH_MAILRECEIVE + case 'm': + mail_received=true; + break; +#endif + default: + fprintf(stderr, "%s: invalid option '%c'\n", argv[0], c); + usage(argv[0]); + break; + } + } + optind++; + } + + if (optind > argc - 1) { + fprintf(stderr, "%s: file not specified\n", argv[0]); + usage(argv[0]); + } + raw_filespec_to_process=argv[optind]; + args_skip=optind; + } + +#ifdef WIN32 + setmode(fileno(stdin), _O_BINARY); + setmode(fileno(stdout), _O_BINARY); + setmode(fileno(stderr), _O_BINARY); +#endif + +#if defined(_MSC_VER) && defined(_DEBUG) + // Get current flag + int tmpFlag = _CrtSetDbgFlag( _CRTDBG_REPORT_FLAG ); + + // Turn on leak-checking bit + tmpFlag |= _CRTDBG_LEAK_CHECK_DF; + + // Set flag to the new value + _CrtSetDbgFlag( tmpFlag ); +// _CrtSetBreakAlloc(61); + + _CrtSetReportMode( _CRT_WARN, _CRTDBG_MODE_FILE ); + _CrtSetReportFile( _CRT_WARN, _CRTDBG_FILE_STDERR ); +#endif + + char filespec_to_process[MAX_STRING]; + full_file_spec(raw_filespec_to_process, filespec_to_process, sizeof(filespec_to_process)); + + const char* request_method=getenv("REQUEST_METHOD"); + bool header_only=request_method && strcasecmp(request_method, "HEAD")==0; + + try { // global try +#ifdef PA_SUPPRESS_SYSTEM_EXCEPTION + call_real_parser_handler__supress_system_exception( +#else + real_parser_handler( +#endif + filespec_to_process, + request_method, header_only); + } catch(const Exception& e) { // global problem + // don't allocate anything on pool here: + // possible pool' exception not catch-ed now + // and there could be out-of-memory exception + char buf[MAX_STRING]; + snprintf(buf, MAX_STRING, "Unhandled exception %s", + e.comment()); + // log it + SAPI::log(SAPI_info, "%s", buf); + + // + int content_length=strlen(buf); + + // prepare header + // capitalized headers are used for preventing malloc during capitalization + SAPI::add_header_attribute(SAPI_info, HTTP_CONTENT_TYPE_CAPITALIZED, "text/plain"); + // don't use 'format' function because it calls malloc + char content_length_cstr[MAX_NUMBER]; + snprintf(content_length_cstr, MAX_NUMBER, "%u", content_length); + SAPI::add_header_attribute(SAPI_info, HTTP_CONTENT_LENGTH_CAPITALIZED, content_length_cstr); + + // send header + SAPI::send_header(SAPI_info); + + // send body + if(!header_only) + SAPI::send_body(SAPI_info, buf, content_length); + + // unsuccessful finish + } +#ifdef PA_DEBUG_CGI_ENTRY_EXIT + log("main: successful return"); +#endif return 0; }