Annotation of parser3/src/targets/isapi/parser3isapi.C, revision 1.133
1.29 paf 1: /** @file
2: Parser: IIS extension.
3:
1.129 moko 4: Copyright (c) 2000-2024 Art. Lebedev Studio (http://www.artlebedev.com)
1.128 moko 5: Authors: Konstantin Morshnev <moko@design.ru>, Alexandr Petrosian <paf@design.ru>
1.77 paf 6: */
1.29 paf 7:
1.133 ! moko 8: volatile const char * IDENT_PARSER3ISAPI_C="$Id: parser3isapi.C,v 1.132 2024/11/10 12:57:17 moko Exp $";
1.29 paf 9:
1.1 paf 10: #ifndef _MSC_VER
1.10 paf 11: # error compile ISAPI module with MSVC [no urge for now to make it autoconf-ed (PAF)]
1.1 paf 12: #endif
1.43 parser 13:
14: #include "pa_config_includes.h"
1.1 paf 15:
1.9 paf 16: #include "pa_sapi.h"
1.1 paf 17: #include "pa_globals.h"
18: #include "pa_request.h"
19: #include "pa_version.h"
20:
1.64 paf 21: #include <windows.h>
22: #include <process.h>
23:
24: #include <httpext.h>
1.51 parser 25:
1.92 paf 26: // defines
27:
1.110 moko 28: #if defined(_MSC_VER) && !defined(_DEBUG)
1.92 paf 29: # define PA_SUPPRESS_SYSTEM_EXCEPTION
30: #endif
31:
32:
1.1 paf 33: #define MAX_STATUS_LENGTH sizeof("xxxx LONGEST STATUS DESCRIPTION")
1.44 parser 34:
35: // consts
1.1 paf 36:
1.83 paf 37: const char* IIS51vars[]={
1.73 paf 38: "APPL_MD_PATH", "APPL_PHYSICAL_PATH",
39: "AUTH_PASSWORD", "AUTH_TYPE", "AUTH_USER",
40: "CERT_COOKIE", "CERT_FLAGS", "CERT_ISSUER", "CERT_KEYSIZE", "CERT_SECRETKEYSIZE",
41: "CERT_SERIALNUMBER", "CERT_SERVER_ISSUER", "CERT_SERVER_SUBJECT", "CERT_SUBJECT",
42: "CONTENT_LENGTH", "CONTENT_TYPE",
1.107 moko 43: "GATEWAY_INTERFACE",
1.73 paf 44: "HTTPS", "HTTPS_KEYSIZE", "HTTPS_SECRETKEYSIZE", "HTTPS_SERVER_ISSUER", "HTTPS_SERVER_SUBJECT",
45: "INSTANCE_ID", "INSTANCE_META_PATH",
1.107 moko 46: "LOCAL_ADDR", "LOGON_USER",
1.73 paf 47: "PATH_INFO", "PATH_TRANSLATED",
48: "QUERY_STRING",
1.107 moko 49: "REMOTE_ADDR", "REMOTE_HOST", "REMOTE_PORT", "REMOTE_USER", "REQUEST_METHOD",
1.73 paf 50: "SCRIPT_NAME",
51: "SERVER_NAME", "SERVER_PORT", "SERVER_PORT_SECURE", "SERVER_PROTOCOL", "SERVER_SOFTWARE",
52: "URL",
53: };
54: const int IIS51var_count=sizeof(IIS51vars)/sizeof(*IIS51vars);
55:
1.65 paf 56: // globals
57:
58: char argv0[MAX_STRING]="";
59:
1.18 paf 60: // SAPI
61:
1.38 parser 62: #ifndef DOXYGEN
63: /*
1.18 paf 64: ISAPI SAPI functions receive this context information.
1.38 parser 65: see Pool::set_context
1.18 paf 66: */
1.83 paf 67: class SAPI_Info {
68: public:
1.3 paf 69: LPEXTENSION_CONTROL_BLOCK lpECB;
70: String *header;
71: DWORD http_response_code;
72: };
1.38 parser 73: #endif
1.3 paf 74:
1.26 paf 75: // goes to 'cs-uri-query' log file field. webmaster: switch it ON[default OFF].
1.83 paf 76: void SAPI::log(SAPI_Info& SAPI_info, const char* fmt, ...) {
1.26 paf 77: va_list args;
78: va_start(args,fmt);
1.99 misha 79: char buf[MAX_LOG_STRING];
1.83 paf 80: const char* prefix="PARSER_ERROR:";
1.26 paf 81: strcpy(buf, prefix);
1.47 parser 82: char *start=buf+strlen(prefix);
1.99 misha 83: DWORD size=vsnprintf(start, MAX_LOG_STRING-strlen(prefix), fmt, args);
84: size=remove_crlf(start, start+size);
1.47 parser 85:
1.114 moko 86: SAPI_info.lpECB->ServerSupportFunction(SAPI_info.lpECB->ConnID, HSE_APPEND_LOG_PARAMETER, buf, &size, 0);
1.55 parser 87: }
88:
89: /// @todo event log
1.114 moko 90: void SAPI::die(const char* fmt, ...) {
91: va_list args;
92: va_start(args, fmt);
1.83 paf 93: if(FILE *log=fopen("c:\\parser3die.log", "at")) {
1.65 paf 94: vfprintf(log, fmt, args);
95: fclose(log);
96: }
1.114 moko 97: // abnormal exit
1.81 paf 98: abort();
1.90 paf 99: // va_end(args);
1.83 paf 100: }
1.1 paf 101:
1.133 ! moko 102: void SAPI::send_error(SAPI_Info& SAPI_info, const char *exception_cstr, const char *status){
1.130 moko 103: // capitalized headers passed for preventing malloc during capitalization
1.133 ! moko 104: add_header_attribute(SAPI_info, HTTP_STATUS_CAPITALIZED, status);
! 105: add_header_attribute(SAPI_info, HTTP_CONTENT_TYPE_CAPITALIZED, "text/plain");
! 106: send_headers(SAPI_info);
! 107: send_body(SAPI_info, exception_cstr, strlen(exception_cstr));
1.130 moko 108: }
109:
1.107 moko 110: char* SAPI::Env::get(SAPI_Info& SAPI_info, const char* name) {
1.83 paf 111: char *variable_buf=new(PointerFreeGC) char[MAX_STRING];
1.1 paf 112: DWORD variable_len = MAX_STRING-1;
113:
1.83 paf 114: if(SAPI_info.lpECB->GetServerVariable(SAPI_info.lpECB->ConnID, const_cast<char *>(name),
1.1 paf 115: variable_buf, &variable_len)) {
1.73 paf 116: if(*variable_buf) { // saw returning len=1 && *buf=0 :(
117: variable_buf[variable_len]=0;
118: return variable_buf;
119: }
1.7 paf 120: } else if (GetLastError()==ERROR_INSUFFICIENT_BUFFER) {
1.83 paf 121: variable_buf=new(PointerFreeGC) char[variable_len+1];
1.7 paf 122:
1.83 paf 123: if(SAPI_info.lpECB->GetServerVariable(SAPI_info.lpECB->ConnID, const_cast<char *>(name),
1.7 paf 124: variable_buf, &variable_len)) {
1.73 paf 125: if(*variable_buf) {
126: variable_buf[variable_len]=0;
127: return variable_buf;
128: }
1.7 paf 129: }
1.1 paf 130: }
1.7 paf 131:
1.1 paf 132: return 0;
133: }
134:
1.118 moko 135: bool SAPI::Env::set(SAPI_Info&, const char*, const char*) {
136: return false;
137: }
138:
1.83 paf 139: static int grep_char(const char* s, char c) {
1.72 paf 140: int result=0;
141: if(s) {
142: while(s=strchr(s, c)) {
143: s++; // skip found c
144: result++;
145: }
146: }
147: return result;
148: }
1.120 moko 149:
1.107 moko 150: const char* const *SAPI::Env::get(SAPI_Info& info) {
1.72 paf 151: // we know this buf is writable
1.107 moko 152: char* all_http_vars=SAPI::Env::get(info, "ALL_HTTP");
1.72 paf 153: const int http_var_count=grep_char(all_http_vars, '\n')+1/*\n for theoretical(never saw) this \0*/;
1.90 paf 154:
1.92 paf 155: const char* *result=new(PointerFreeGC) const char*[IIS51var_count+http_var_count+1/*0*/];
1.83 paf 156: const char* *cur=result;
1.72 paf 157:
158: // IIS5.1 vars
159: for(int i=0; i<IIS51var_count; i++) {
1.83 paf 160: const char* key=IIS51vars[i];
1.107 moko 161: if(const char* value=SAPI::Env::get(info, key))
1.120 moko 162: *cur++=pa_strcat(key, "=", value);
1.72 paf 163: }
164:
165: // HTTP_* vars
166: if(char *s=all_http_vars) {
167: while(char *key=lsplit(&s, '\n'))
168: if(char *value=lsplit(key, ':'))
1.123 moko 169: *cur++=pa_strcat(key, "=", value);
1.72 paf 170: }
171:
172: // mark EOE
1.123 moko 173: *cur=0;
1.72 paf 174:
175: return result;
176: }
177:
1.83 paf 178: size_t SAPI::read_post(SAPI_Info& SAPI_info, char *buf, size_t max_bytes) {
1.1 paf 179: DWORD read_from_buf=0;
180: DWORD read_from_input=0;
181: DWORD total_read=0;
182:
1.83 paf 183: read_from_buf=min(SAPI_info.lpECB->cbAvailable, max_bytes);
184: memcpy(buf, SAPI_info.lpECB->lpbData, read_from_buf);
1.1 paf 185: total_read+=read_from_buf;
186:
187: if(read_from_buf<max_bytes &&
1.83 paf 188: read_from_buf<SAPI_info.lpECB->cbTotalBytes) {
1.1 paf 189: DWORD cbRead=0, cbSize;
190:
1.3 paf 191: read_from_input=min(max_bytes-read_from_buf,
1.83 paf 192: SAPI_info.lpECB->cbTotalBytes-read_from_buf);
1.1 paf 193: while(cbRead < read_from_input) {
194: cbSize=read_from_input - cbRead;
1.83 paf 195: if(!SAPI_info.lpECB->ReadClient(SAPI_info.lpECB->ConnID,
1.3 paf 196: buf+read_from_buf+cbRead, &cbSize) ||
1.1 paf 197: cbSize==0)
198: break;
199: cbRead+=cbSize;
200: }
201: total_read+=cbRead;
202: }
203: return total_read;
204: }
205:
1.117 moko 206: void SAPI::add_header_attribute(SAPI_Info& SAPI_info, const char* dont_store_key, const char* dont_store_value) {
207: if(strcasecmp(dont_store_key, "location")==0)
1.83 paf 208: SAPI_info.http_response_code=302;
209:
1.117 moko 210: if(strcasecmp(dont_store_key, HTTP_STATUS)==0)
211: SAPI_info.http_response_code=atoi(dont_store_value);
1.83 paf 212: else
1.102 misha 213: (*SAPI_info.header) << capitalize(dont_store_key) << ": " << pa_strdup(dont_store_value) << "\r\n";
1.1 paf 214: }
215:
1.23 paf 216: /// @todo intelligent cache-control
1.131 moko 217: void SAPI::send_headers(SAPI_Info& SAPI_info) {
1.64 paf 218: HSE_SEND_HEADER_EX_INFO header_info;
1.1 paf 219:
220: char status_buf[MAX_STATUS_LENGTH];
1.83 paf 221: switch(SAPI_info.http_response_code) {
1.1 paf 222: case 200:
223: header_info.pszStatus="200 OK";
224: break;
225: case 302:
226: header_info.pszStatus="302 Moved Temporarily";
227: break;
1.8 paf 228: case 401:// useless untill parser auth mech
1.1 paf 229: header_info.pszStatus="401 Authorization Required";
1.8 paf 230: break;
1.1 paf 231: default:
1.3 paf 232: snprintf(status_buf, MAX_STATUS_LENGTH,
1.83 paf 233: "%d Undescribed", SAPI_info.http_response_code);
1.1 paf 234: header_info.pszStatus=status_buf;
235: break;
236: }
237: header_info.cchStatus=strlen(header_info.pszStatus);
1.83 paf 238: *SAPI_info.header << "\r\n"; // ISAPI v<5 did quite well without it
239: header_info.pszHeader=SAPI_info.header->cstr();
240: header_info.cchHeader=SAPI_info.header->length();
1.5 paf 241: header_info.fKeepConn=true;
1.1 paf 242:
1.83 paf 243: SAPI_info.lpECB->dwHttpStatusCode=SAPI_info.http_response_code;
1.1 paf 244:
1.83 paf 245: SAPI_info.lpECB->ServerSupportFunction(SAPI_info.lpECB->ConnID,
1.3 paf 246: HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 247: }
248:
1.133 ! moko 249: void SAPI::clear_headers(SAPI_Info& SAPI_info) {
! 250: SAPI_info.header=new String;
1.131 moko 251: }
252:
1.91 paf 253: size_t SAPI::send_body(SAPI_Info& SAPI_info, const void *buf, size_t size) {
1.1 paf 254: DWORD num_bytes=size;
1.91 paf 255: if(!SAPI_info.lpECB->WriteClient(SAPI_info.lpECB->ConnID,
256: const_cast<void *>(buf), &num_bytes, HSE_IO_SYNC))
257: return 0;
258: return (size_t)num_bytes;
1.1 paf 259: }
1.16 paf 260:
1.1 paf 261:
1.15 paf 262: static bool parser_init() {
1.1 paf 263: static bool globals_inited=false;
264: if(globals_inited)
1.15 paf 265: return true;
1.1 paf 266: globals_inited=true;
267:
1.53 parser 268: try {
1.111 moko 269: // init libraries
1.83 paf 270: pa_globals_init();
1.15 paf 271: // successful finish
272: return true;
1.96 paf 273: } catch(.../*const Exception& e*/) { // global problem
1.15 paf 274: // unsuccessful finish
275: return false;
1.1 paf 276: }
277: }
278:
1.89 paf 279: static void parser_done() {
1.111 moko 280: // finalize libraries
1.89 paf 281: pa_globals_done();
282: }
283:
1.1 paf 284: /// ISAPI //
285: BOOL WINAPI GetExtensionVersion(HSE_VERSION_INFO *pVer) {
286: pVer->dwExtensionVersion = HSE_VERSION;
1.127 moko 287: pa_strncpy(pVer->lpszExtensionDesc, "Parser " PARSER_VERSION, HSE_MAX_EXT_DLL_NAME_LEN);
1.15 paf 288: return parser_init();
1.89 paf 289: }
290: // dwFlags & HSE_TERM_MUST_UNLOAD means we can't return false
291: BOOL WINAPI TerminateExtension(
292: DWORD /*dwFlags*/
293: )
294: {
295: parser_done();
296:
297: return TRUE;
1.1 paf 298: }
299:
1.6 paf 300: /**
301: ISAPI // main workhorse
302:
1.23 paf 303: @todo
1.10 paf 304: IIS: remove trailing default-document[index.html] from $request.uri.
305: to do that we need to consult metabase,
1.12 paf 306: wich is tested&works but seems slow runtime
307: and not could-be-quickly-implemented if prepared.
1.37 parser 308: @test
309: PARSER_VERSION from outside
1.6 paf 310: */
1.83 paf 311: void real_parser_handler(SAPI_Info& SAPI_info, bool header_only) {
1.88 paf 312: // collect garbage from prev request
1.126 moko 313: pa_gc_collect();
1.88 paf 314:
1.83 paf 315: SAPI_info.header=new String;
316: LPEXTENSION_CONTROL_BLOCK lpECB=SAPI_info.lpECB;
1.53 parser 317:
318: // Request info
1.83 paf 319: Request_info request_info; memset(&request_info, 0, sizeof(request_info));
1.53 parser 320:
1.125 moko 321: char *filespec_to_process=pa_strdup(lpECB->lpszPathTranslated);
1.53 parser 322: #ifdef WIN32
323: back_slashes_to_slashes(filespec_to_process);
324: #endif
325:
1.107 moko 326: if(const char* path_info=SAPI::Env::get(SAPI_info, "PATH_INFO")) {
1.53 parser 327: // IIS
328: size_t len=strlen(filespec_to_process)-strlen(path_info);
1.127 moko 329: char *buf=new(PointerFreeGC) char[len];
330: pa_strncpy(buf, filespec_to_process, len);
1.53 parser 331: request_info.document_root=buf;
332: } else
1.120 moko 333: throw Exception(PARSER_RUNTIME, 0, "ISAPI: no PATH_INFO defined (in reinventing DOCUMENT_ROOT)");
1.53 parser 334:
335: request_info.path_translated=filespec_to_process;
336: request_info.method=lpECB->lpszMethod;
337: request_info.query_string=lpECB->lpszQueryString;
1.120 moko 338: request_info.uri=lpECB->lpszQueryString && *lpECB->lpszQueryString ? pa_strcat(lpECB->lpszPathInfo, "?", lpECB->lpszQueryString) : lpECB->lpszPathInfo;
1.53 parser 339: request_info.content_type=lpECB->lpszContentType;
340: request_info.content_length=lpECB->cbTotalBytes;
1.107 moko 341: request_info.cookie=SAPI::Env::get(SAPI_info, "HTTP_COOKIE");
1.76 paf 342: request_info.mail_received=false;
1.53 parser 343:
344: // prepare to process request
1.119 moko 345: Request request(SAPI_info, request_info, String::Language(String::L_HTML|String::L_OPTIMIZE_BIT));
1.53 parser 346:
1.65 paf 347: // beside by binary
1.75 paf 348: static char beside_binary_path[MAX_STRING];
1.127 moko 349: pa_strncpy(beside_binary_path, argv0, MAX_STRING); // filespec of my binary
1.119 moko 350: if(!(rsplit(beside_binary_path, '/') || rsplit(beside_binary_path, '\\'))) { // strip filename
1.65 paf 351: // no path, just filename
1.75 paf 352: beside_binary_path[0]='.'; beside_binary_path[1]=0;
1.119 moko 353: }
1.74 paf 354: char config_filespec[MAX_STRING];
1.119 moko 355: snprintf(config_filespec, MAX_STRING, "%s/%s", beside_binary_path, AUTO_FILE_NAME);
1.65 paf 356:
1.53 parser 357: // process the request
1.119 moko 358: request.core(entry_exists(config_filespec) ? config_filespec : NULL, header_only);
1.53 parser 359: }
360:
1.92 paf 361: #ifdef PA_SUPPRESS_SYSTEM_EXCEPTION
1.113 moko 362: static const Exception call_real_parser_handler__do_PEH_return_it(SAPI_Info& SAPI_info, bool header_only) {
1.92 paf 363: try {
364: real_parser_handler(SAPI_info, header_only);
365: } catch(const Exception& e) {
366: return e;
367: }
368:
369: return Exception();
370: }
1.113 moko 371:
372: static void call_real_parser_handler__supress_system_exception(SAPI_Info& SAPI_info, bool header_only) {
1.92 paf 373: Exception parser_exception;
1.53 parser 374: LPEXCEPTION_POINTERS system_exception=0;
1.92 paf 375:
1.53 parser 376: __try {
1.113 moko 377: parser_exception=call_real_parser_handler__do_PEH_return_it(SAPI_info, header_only);
378: } __except ( (system_exception=GetExceptionInformation()), EXCEPTION_EXECUTE_HANDLER) {
1.53 parser 379: if(system_exception)
380: if(_EXCEPTION_RECORD *er=system_exception->ExceptionRecord)
1.113 moko 381: throw Exception("system", 0, "0x%08X at 0x%08X", er->ExceptionCode, er->ExceptionAddress);
1.53 parser 382: else
1.113 moko 383: throw Exception("system", 0, "<no exception record>");
1.92 paf 384: else
1.113 moko 385: throw Exception("system", 0, "<no exception information>");
1.53 parser 386: }
1.92 paf 387:
388: if(parser_exception)
389: throw Exception(parser_exception);
390: }
1.53 parser 391: #endif
392:
1.83 paf 393: DWORD WINAPI HttpExtensionProc(LPEXTENSION_CONTROL_BLOCK lpECB) {
394: //_asm int 3;
395: SAPI_Info SAPI_info={
1.15 paf 396: lpECB,
1.83 paf 397: 0, // filling later: so that if there would be error pool would have SAPI_info
1.80 paf 398: 200 // default http_response_code [lpECB->dwHttpStatusCode seems to be always 0, even on 404 redirect to /404.html]
1.15 paf 399: };
1.71 paf 400:
1.1 paf 401: bool header_only=strcasecmp(lpECB->lpszMethod, "HEAD")==0;
1.53 parser 402: try { // global try
1.92 paf 403: #ifdef PA_SUPPRESS_SYSTEM_EXCEPTION
404: call_real_parser_handler__supress_system_exception(
405: #else
406: real_parser_handler(
407: #endif
408: SAPI_info, header_only);
1.2 paf 409: // successful finish
1.132 moko 410: } catch(const Exception& e) { // just in case
1.16 paf 411: // log it
1.116 moko 412: SAPI::log(SAPI_info, "%s", e.comment());
1.12 paf 413:
414: HSE_SEND_HEADER_EX_INFO header_info;
1.132 moko 415: header_info.pszStatus="500 Internal Server Error";
1.12 paf 416: header_info.cchStatus=strlen(header_info.pszStatus);
1.116 moko 417: header_info.pszHeader=HTTP_CONTENT_TYPE_CAPITALIZED ": text/plain\r\n\r\n";
418: header_info.cchHeader=strlen(header_info.pszHeader);
1.12 paf 419: header_info.fKeepConn=true;
420:
1.1 paf 421: // send header
1.132 moko 422: lpECB->dwHttpStatusCode=500;
1.116 moko 423: lpECB->ServerSupportFunction(lpECB->ConnID, HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 424:
425: // send body
426: if(!header_only)
1.116 moko 427: SAPI::send_body(SAPI_info, e.comment(), strlen(e.comment()));
1.1 paf 428:
429: // unsuccessful finish
430: }
1.71 paf 431: return HSE_STATUS_SUCCESS_AND_KEEP_CONN;
1.1 paf 432: }
1.65 paf 433:
434: BOOL WINAPI DllMain(
435: HINSTANCE hinstDLL, // handle to the DLL module
1.85 paf 436: DWORD /*fdwReason*/, // reason for calling function
437: LPVOID /*lpvReserved*/ // reserved
1.65 paf 438: ) {
439:
440: GetModuleFileName(
441: hinstDLL, // handle to module
442: argv0, // file name of module
443: sizeof(argv0) // size of buffer
444: );
445:
446: return TRUE;
447: }
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