Annotation of parser3/src/targets/isapi/parser3isapi.C, revision 1.136
1.29 paf 1: /** @file
2: Parser: IIS extension.
3:
1.136 ! moko 4: Copyright (c) 2000-2026 Art. Lebedev Studio (https://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:
1.136 ! moko 8: volatile const char * IDENT_PARSER3ISAPI_C="$Id: parser3isapi.C,v 1.135 2024/12/11 18:35:31 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]="";
1.134 moko 59: const char* parser3_mode="isapi"; // $status:mode
1.135 moko 60: const char *parser3_log_filespec(){ return ""; } // $status:log-filename
1.65 paf 61:
1.18 paf 62: // SAPI
63:
1.38 parser 64: #ifndef DOXYGEN
65: /*
1.18 paf 66: ISAPI SAPI functions receive this context information.
1.38 parser 67: see Pool::set_context
1.18 paf 68: */
1.83 paf 69: class SAPI_Info {
70: public:
1.3 paf 71: LPEXTENSION_CONTROL_BLOCK lpECB;
72: String *header;
73: DWORD http_response_code;
74: };
1.38 parser 75: #endif
1.3 paf 76:
1.26 paf 77: // goes to 'cs-uri-query' log file field. webmaster: switch it ON[default OFF].
1.83 paf 78: void SAPI::log(SAPI_Info& SAPI_info, const char* fmt, ...) {
1.26 paf 79: va_list args;
80: va_start(args,fmt);
1.99 misha 81: char buf[MAX_LOG_STRING];
1.83 paf 82: const char* prefix="PARSER_ERROR:";
1.26 paf 83: strcpy(buf, prefix);
1.47 parser 84: char *start=buf+strlen(prefix);
1.99 misha 85: DWORD size=vsnprintf(start, MAX_LOG_STRING-strlen(prefix), fmt, args);
86: size=remove_crlf(start, start+size);
1.47 parser 87:
1.114 moko 88: SAPI_info.lpECB->ServerSupportFunction(SAPI_info.lpECB->ConnID, HSE_APPEND_LOG_PARAMETER, buf, &size, 0);
1.55 parser 89: }
90:
91: /// @todo event log
1.114 moko 92: void SAPI::die(const char* fmt, ...) {
93: va_list args;
94: va_start(args, fmt);
1.83 paf 95: if(FILE *log=fopen("c:\\parser3die.log", "at")) {
1.65 paf 96: vfprintf(log, fmt, args);
97: fclose(log);
98: }
1.114 moko 99: // abnormal exit
1.81 paf 100: abort();
1.90 paf 101: // va_end(args);
1.83 paf 102: }
1.1 paf 103:
1.133 moko 104: void SAPI::send_error(SAPI_Info& SAPI_info, const char *exception_cstr, const char *status){
1.130 moko 105: // capitalized headers passed for preventing malloc during capitalization
1.133 moko 106: add_header_attribute(SAPI_info, HTTP_STATUS_CAPITALIZED, status);
107: add_header_attribute(SAPI_info, HTTP_CONTENT_TYPE_CAPITALIZED, "text/plain");
108: send_headers(SAPI_info);
109: send_body(SAPI_info, exception_cstr, strlen(exception_cstr));
1.130 moko 110: }
111:
1.107 moko 112: char* SAPI::Env::get(SAPI_Info& SAPI_info, const char* name) {
1.83 paf 113: char *variable_buf=new(PointerFreeGC) char[MAX_STRING];
1.1 paf 114: DWORD variable_len = MAX_STRING-1;
115:
1.83 paf 116: if(SAPI_info.lpECB->GetServerVariable(SAPI_info.lpECB->ConnID, const_cast<char *>(name),
1.1 paf 117: variable_buf, &variable_len)) {
1.73 paf 118: if(*variable_buf) { // saw returning len=1 && *buf=0 :(
119: variable_buf[variable_len]=0;
120: return variable_buf;
121: }
1.7 paf 122: } else if (GetLastError()==ERROR_INSUFFICIENT_BUFFER) {
1.83 paf 123: variable_buf=new(PointerFreeGC) char[variable_len+1];
1.7 paf 124:
1.83 paf 125: if(SAPI_info.lpECB->GetServerVariable(SAPI_info.lpECB->ConnID, const_cast<char *>(name),
1.7 paf 126: variable_buf, &variable_len)) {
1.73 paf 127: if(*variable_buf) {
128: variable_buf[variable_len]=0;
129: return variable_buf;
130: }
1.7 paf 131: }
1.1 paf 132: }
1.7 paf 133:
1.1 paf 134: return 0;
135: }
136:
1.118 moko 137: bool SAPI::Env::set(SAPI_Info&, const char*, const char*) {
138: return false;
139: }
140:
1.83 paf 141: static int grep_char(const char* s, char c) {
1.72 paf 142: int result=0;
143: if(s) {
144: while(s=strchr(s, c)) {
145: s++; // skip found c
146: result++;
147: }
148: }
149: return result;
150: }
1.120 moko 151:
1.107 moko 152: const char* const *SAPI::Env::get(SAPI_Info& info) {
1.72 paf 153: // we know this buf is writable
1.107 moko 154: char* all_http_vars=SAPI::Env::get(info, "ALL_HTTP");
1.72 paf 155: const int http_var_count=grep_char(all_http_vars, '\n')+1/*\n for theoretical(never saw) this \0*/;
1.90 paf 156:
1.92 paf 157: const char* *result=new(PointerFreeGC) const char*[IIS51var_count+http_var_count+1/*0*/];
1.83 paf 158: const char* *cur=result;
1.72 paf 159:
160: // IIS5.1 vars
161: for(int i=0; i<IIS51var_count; i++) {
1.83 paf 162: const char* key=IIS51vars[i];
1.107 moko 163: if(const char* value=SAPI::Env::get(info, key))
1.120 moko 164: *cur++=pa_strcat(key, "=", value);
1.72 paf 165: }
166:
167: // HTTP_* vars
168: if(char *s=all_http_vars) {
169: while(char *key=lsplit(&s, '\n'))
170: if(char *value=lsplit(key, ':'))
1.123 moko 171: *cur++=pa_strcat(key, "=", value);
1.72 paf 172: }
173:
174: // mark EOE
1.123 moko 175: *cur=0;
1.72 paf 176:
177: return result;
178: }
179:
1.83 paf 180: size_t SAPI::read_post(SAPI_Info& SAPI_info, char *buf, size_t max_bytes) {
1.1 paf 181: DWORD read_from_buf=0;
182: DWORD read_from_input=0;
183: DWORD total_read=0;
184:
1.83 paf 185: read_from_buf=min(SAPI_info.lpECB->cbAvailable, max_bytes);
186: memcpy(buf, SAPI_info.lpECB->lpbData, read_from_buf);
1.1 paf 187: total_read+=read_from_buf;
188:
189: if(read_from_buf<max_bytes &&
1.83 paf 190: read_from_buf<SAPI_info.lpECB->cbTotalBytes) {
1.1 paf 191: DWORD cbRead=0, cbSize;
192:
1.3 paf 193: read_from_input=min(max_bytes-read_from_buf,
1.83 paf 194: SAPI_info.lpECB->cbTotalBytes-read_from_buf);
1.1 paf 195: while(cbRead < read_from_input) {
196: cbSize=read_from_input - cbRead;
1.83 paf 197: if(!SAPI_info.lpECB->ReadClient(SAPI_info.lpECB->ConnID,
1.3 paf 198: buf+read_from_buf+cbRead, &cbSize) ||
1.1 paf 199: cbSize==0)
200: break;
201: cbRead+=cbSize;
202: }
203: total_read+=cbRead;
204: }
205: return total_read;
206: }
207:
1.117 moko 208: void SAPI::add_header_attribute(SAPI_Info& SAPI_info, const char* dont_store_key, const char* dont_store_value) {
209: if(strcasecmp(dont_store_key, "location")==0)
1.83 paf 210: SAPI_info.http_response_code=302;
211:
1.117 moko 212: if(strcasecmp(dont_store_key, HTTP_STATUS)==0)
213: SAPI_info.http_response_code=atoi(dont_store_value);
1.83 paf 214: else
1.102 misha 215: (*SAPI_info.header) << capitalize(dont_store_key) << ": " << pa_strdup(dont_store_value) << "\r\n";
1.1 paf 216: }
217:
1.23 paf 218: /// @todo intelligent cache-control
1.131 moko 219: void SAPI::send_headers(SAPI_Info& SAPI_info) {
1.64 paf 220: HSE_SEND_HEADER_EX_INFO header_info;
1.1 paf 221:
222: char status_buf[MAX_STATUS_LENGTH];
1.83 paf 223: switch(SAPI_info.http_response_code) {
1.1 paf 224: case 200:
225: header_info.pszStatus="200 OK";
226: break;
227: case 302:
228: header_info.pszStatus="302 Moved Temporarily";
229: break;
1.8 paf 230: case 401:// useless untill parser auth mech
1.1 paf 231: header_info.pszStatus="401 Authorization Required";
1.8 paf 232: break;
1.1 paf 233: default:
1.3 paf 234: snprintf(status_buf, MAX_STATUS_LENGTH,
1.83 paf 235: "%d Undescribed", SAPI_info.http_response_code);
1.1 paf 236: header_info.pszStatus=status_buf;
237: break;
238: }
239: header_info.cchStatus=strlen(header_info.pszStatus);
1.83 paf 240: *SAPI_info.header << "\r\n"; // ISAPI v<5 did quite well without it
241: header_info.pszHeader=SAPI_info.header->cstr();
242: header_info.cchHeader=SAPI_info.header->length();
1.5 paf 243: header_info.fKeepConn=true;
1.1 paf 244:
1.83 paf 245: SAPI_info.lpECB->dwHttpStatusCode=SAPI_info.http_response_code;
1.1 paf 246:
1.83 paf 247: SAPI_info.lpECB->ServerSupportFunction(SAPI_info.lpECB->ConnID,
1.3 paf 248: HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 249: }
250:
1.133 moko 251: void SAPI::clear_headers(SAPI_Info& SAPI_info) {
252: SAPI_info.header=new String;
1.131 moko 253: }
254:
1.91 paf 255: size_t SAPI::send_body(SAPI_Info& SAPI_info, const void *buf, size_t size) {
1.1 paf 256: DWORD num_bytes=size;
1.91 paf 257: if(!SAPI_info.lpECB->WriteClient(SAPI_info.lpECB->ConnID,
258: const_cast<void *>(buf), &num_bytes, HSE_IO_SYNC))
259: return 0;
260: return (size_t)num_bytes;
1.1 paf 261: }
1.16 paf 262:
1.1 paf 263:
1.15 paf 264: static bool parser_init() {
1.1 paf 265: static bool globals_inited=false;
266: if(globals_inited)
1.15 paf 267: return true;
1.1 paf 268: globals_inited=true;
269:
1.53 parser 270: try {
1.111 moko 271: // init libraries
1.83 paf 272: pa_globals_init();
1.15 paf 273: // successful finish
274: return true;
1.96 paf 275: } catch(.../*const Exception& e*/) { // global problem
1.15 paf 276: // unsuccessful finish
277: return false;
1.1 paf 278: }
279: }
280:
1.89 paf 281: static void parser_done() {
1.111 moko 282: // finalize libraries
1.89 paf 283: pa_globals_done();
284: }
285:
1.1 paf 286: /// ISAPI //
287: BOOL WINAPI GetExtensionVersion(HSE_VERSION_INFO *pVer) {
288: pVer->dwExtensionVersion = HSE_VERSION;
1.127 moko 289: pa_strncpy(pVer->lpszExtensionDesc, "Parser " PARSER_VERSION, HSE_MAX_EXT_DLL_NAME_LEN);
1.15 paf 290: return parser_init();
1.89 paf 291: }
292: // dwFlags & HSE_TERM_MUST_UNLOAD means we can't return false
293: BOOL WINAPI TerminateExtension(
294: DWORD /*dwFlags*/
295: )
296: {
297: parser_done();
298:
299: return TRUE;
1.1 paf 300: }
301:
1.6 paf 302: /**
303: ISAPI // main workhorse
304:
1.23 paf 305: @todo
1.10 paf 306: IIS: remove trailing default-document[index.html] from $request.uri.
307: to do that we need to consult metabase,
1.12 paf 308: wich is tested&works but seems slow runtime
309: and not could-be-quickly-implemented if prepared.
1.37 parser 310: @test
311: PARSER_VERSION from outside
1.6 paf 312: */
1.83 paf 313: void real_parser_handler(SAPI_Info& SAPI_info, bool header_only) {
1.88 paf 314: // collect garbage from prev request
1.126 moko 315: pa_gc_collect();
1.88 paf 316:
1.83 paf 317: SAPI_info.header=new String;
318: LPEXTENSION_CONTROL_BLOCK lpECB=SAPI_info.lpECB;
1.53 parser 319:
320: // Request info
1.83 paf 321: Request_info request_info; memset(&request_info, 0, sizeof(request_info));
1.53 parser 322:
1.125 moko 323: char *filespec_to_process=pa_strdup(lpECB->lpszPathTranslated);
1.53 parser 324: #ifdef WIN32
325: back_slashes_to_slashes(filespec_to_process);
326: #endif
327:
1.107 moko 328: if(const char* path_info=SAPI::Env::get(SAPI_info, "PATH_INFO")) {
1.53 parser 329: // IIS
330: size_t len=strlen(filespec_to_process)-strlen(path_info);
1.127 moko 331: char *buf=new(PointerFreeGC) char[len];
332: pa_strncpy(buf, filespec_to_process, len);
1.53 parser 333: request_info.document_root=buf;
334: } else
1.120 moko 335: throw Exception(PARSER_RUNTIME, 0, "ISAPI: no PATH_INFO defined (in reinventing DOCUMENT_ROOT)");
1.53 parser 336:
337: request_info.path_translated=filespec_to_process;
338: request_info.method=lpECB->lpszMethod;
339: request_info.query_string=lpECB->lpszQueryString;
1.120 moko 340: request_info.uri=lpECB->lpszQueryString && *lpECB->lpszQueryString ? pa_strcat(lpECB->lpszPathInfo, "?", lpECB->lpszQueryString) : lpECB->lpszPathInfo;
1.53 parser 341: request_info.content_type=lpECB->lpszContentType;
342: request_info.content_length=lpECB->cbTotalBytes;
1.107 moko 343: request_info.cookie=SAPI::Env::get(SAPI_info, "HTTP_COOKIE");
1.76 paf 344: request_info.mail_received=false;
1.53 parser 345:
346: // prepare to process request
1.119 moko 347: Request request(SAPI_info, request_info, String::Language(String::L_HTML|String::L_OPTIMIZE_BIT));
1.53 parser 348:
1.65 paf 349: // beside by binary
1.75 paf 350: static char beside_binary_path[MAX_STRING];
1.127 moko 351: pa_strncpy(beside_binary_path, argv0, MAX_STRING); // filespec of my binary
1.119 moko 352: if(!(rsplit(beside_binary_path, '/') || rsplit(beside_binary_path, '\\'))) { // strip filename
1.65 paf 353: // no path, just filename
1.75 paf 354: beside_binary_path[0]='.'; beside_binary_path[1]=0;
1.119 moko 355: }
1.74 paf 356: char config_filespec[MAX_STRING];
1.119 moko 357: snprintf(config_filespec, MAX_STRING, "%s/%s", beside_binary_path, AUTO_FILE_NAME);
1.65 paf 358:
1.53 parser 359: // process the request
1.119 moko 360: request.core(entry_exists(config_filespec) ? config_filespec : NULL, header_only);
1.53 parser 361: }
362:
1.92 paf 363: #ifdef PA_SUPPRESS_SYSTEM_EXCEPTION
1.113 moko 364: static const Exception call_real_parser_handler__do_PEH_return_it(SAPI_Info& SAPI_info, bool header_only) {
1.92 paf 365: try {
366: real_parser_handler(SAPI_info, header_only);
367: } catch(const Exception& e) {
368: return e;
369: }
370:
371: return Exception();
372: }
1.113 moko 373:
374: static void call_real_parser_handler__supress_system_exception(SAPI_Info& SAPI_info, bool header_only) {
1.92 paf 375: Exception parser_exception;
1.53 parser 376: LPEXCEPTION_POINTERS system_exception=0;
1.92 paf 377:
1.53 parser 378: __try {
1.113 moko 379: parser_exception=call_real_parser_handler__do_PEH_return_it(SAPI_info, header_only);
380: } __except ( (system_exception=GetExceptionInformation()), EXCEPTION_EXECUTE_HANDLER) {
1.53 parser 381: if(system_exception)
382: if(_EXCEPTION_RECORD *er=system_exception->ExceptionRecord)
1.113 moko 383: throw Exception("system", 0, "0x%08X at 0x%08X", er->ExceptionCode, er->ExceptionAddress);
1.53 parser 384: else
1.113 moko 385: throw Exception("system", 0, "<no exception record>");
1.92 paf 386: else
1.113 moko 387: throw Exception("system", 0, "<no exception information>");
1.53 parser 388: }
1.92 paf 389:
390: if(parser_exception)
391: throw Exception(parser_exception);
392: }
1.53 parser 393: #endif
394:
1.83 paf 395: DWORD WINAPI HttpExtensionProc(LPEXTENSION_CONTROL_BLOCK lpECB) {
396: //_asm int 3;
397: SAPI_Info SAPI_info={
1.15 paf 398: lpECB,
1.83 paf 399: 0, // filling later: so that if there would be error pool would have SAPI_info
1.80 paf 400: 200 // default http_response_code [lpECB->dwHttpStatusCode seems to be always 0, even on 404 redirect to /404.html]
1.15 paf 401: };
1.71 paf 402:
1.1 paf 403: bool header_only=strcasecmp(lpECB->lpszMethod, "HEAD")==0;
1.53 parser 404: try { // global try
1.92 paf 405: #ifdef PA_SUPPRESS_SYSTEM_EXCEPTION
406: call_real_parser_handler__supress_system_exception(
407: #else
408: real_parser_handler(
409: #endif
410: SAPI_info, header_only);
1.2 paf 411: // successful finish
1.132 moko 412: } catch(const Exception& e) { // just in case
1.16 paf 413: // log it
1.116 moko 414: SAPI::log(SAPI_info, "%s", e.comment());
1.12 paf 415:
416: HSE_SEND_HEADER_EX_INFO header_info;
1.132 moko 417: header_info.pszStatus="500 Internal Server Error";
1.12 paf 418: header_info.cchStatus=strlen(header_info.pszStatus);
1.116 moko 419: header_info.pszHeader=HTTP_CONTENT_TYPE_CAPITALIZED ": text/plain\r\n\r\n";
420: header_info.cchHeader=strlen(header_info.pszHeader);
1.12 paf 421: header_info.fKeepConn=true;
422:
1.1 paf 423: // send header
1.132 moko 424: lpECB->dwHttpStatusCode=500;
1.116 moko 425: lpECB->ServerSupportFunction(lpECB->ConnID, HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 426:
427: // send body
428: if(!header_only)
1.116 moko 429: SAPI::send_body(SAPI_info, e.comment(), strlen(e.comment()));
1.1 paf 430:
431: // unsuccessful finish
432: }
1.71 paf 433: return HSE_STATUS_SUCCESS_AND_KEEP_CONN;
1.1 paf 434: }
1.65 paf 435:
436: BOOL WINAPI DllMain(
437: HINSTANCE hinstDLL, // handle to the DLL module
1.85 paf 438: DWORD /*fdwReason*/, // reason for calling function
439: LPVOID /*lpvReserved*/ // reserved
1.65 paf 440: ) {
441:
442: GetModuleFileName(
443: hinstDLL, // handle to module
444: argv0, // file name of module
445: sizeof(argv0) // size of buffer
446: );
447:
448: return TRUE;
449: }
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