Annotation of parser3/src/targets/isapi/parser3isapi.C, revision 1.124
1.29 paf 1: /** @file
2: Parser: IIS extension.
3:
1.124 ! moko 4: Copyright (c) 2000-2020 Art. Lebedev Studio (http://www.artlebedev.com)
1.63 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.77 paf 6: */
1.29 paf 7:
1.124 ! moko 8: volatile const char * IDENT_PARSER3ISAPI_C="$Id: parser3isapi.C,v 1.123 2020/12/15 13:37:35 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:
1.107 moko 102: char* SAPI::Env::get(SAPI_Info& SAPI_info, const char* name) {
1.83 paf 103: char *variable_buf=new(PointerFreeGC) char[MAX_STRING];
1.1 paf 104: DWORD variable_len = MAX_STRING-1;
105:
1.83 paf 106: if(SAPI_info.lpECB->GetServerVariable(SAPI_info.lpECB->ConnID, const_cast<char *>(name),
1.1 paf 107: variable_buf, &variable_len)) {
1.73 paf 108: if(*variable_buf) { // saw returning len=1 && *buf=0 :(
109: variable_buf[variable_len]=0;
110: return variable_buf;
111: }
1.7 paf 112: } else if (GetLastError()==ERROR_INSUFFICIENT_BUFFER) {
1.83 paf 113: variable_buf=new(PointerFreeGC) char[variable_len+1];
1.7 paf 114:
1.83 paf 115: if(SAPI_info.lpECB->GetServerVariable(SAPI_info.lpECB->ConnID, const_cast<char *>(name),
1.7 paf 116: variable_buf, &variable_len)) {
1.73 paf 117: if(*variable_buf) {
118: variable_buf[variable_len]=0;
119: return variable_buf;
120: }
1.7 paf 121: }
1.1 paf 122: }
1.7 paf 123:
1.1 paf 124: return 0;
125: }
126:
1.118 moko 127: bool SAPI::Env::set(SAPI_Info&, const char*, const char*) {
128: return false;
129: }
130:
1.83 paf 131: static int grep_char(const char* s, char c) {
1.72 paf 132: int result=0;
133: if(s) {
134: while(s=strchr(s, c)) {
135: s++; // skip found c
136: result++;
137: }
138: }
139: return result;
140: }
1.120 moko 141:
1.107 moko 142: const char* const *SAPI::Env::get(SAPI_Info& info) {
1.72 paf 143: // we know this buf is writable
1.107 moko 144: char* all_http_vars=SAPI::Env::get(info, "ALL_HTTP");
1.72 paf 145: const int http_var_count=grep_char(all_http_vars, '\n')+1/*\n for theoretical(never saw) this \0*/;
1.90 paf 146:
1.92 paf 147: const char* *result=new(PointerFreeGC) const char*[IIS51var_count+http_var_count+1/*0*/];
1.83 paf 148: const char* *cur=result;
1.72 paf 149:
150: // IIS5.1 vars
151: for(int i=0; i<IIS51var_count; i++) {
1.83 paf 152: const char* key=IIS51vars[i];
1.107 moko 153: if(const char* value=SAPI::Env::get(info, key))
1.120 moko 154: *cur++=pa_strcat(key, "=", value);
1.72 paf 155: }
156:
157: // HTTP_* vars
158: if(char *s=all_http_vars) {
159: while(char *key=lsplit(&s, '\n'))
160: if(char *value=lsplit(key, ':'))
1.123 moko 161: *cur++=pa_strcat(key, "=", value);
1.72 paf 162: }
163:
164: // mark EOE
1.123 moko 165: *cur=0;
1.72 paf 166:
167: return result;
168: }
169:
1.83 paf 170: size_t SAPI::read_post(SAPI_Info& SAPI_info, char *buf, size_t max_bytes) {
1.1 paf 171: DWORD read_from_buf=0;
172: DWORD read_from_input=0;
173: DWORD total_read=0;
174:
1.83 paf 175: read_from_buf=min(SAPI_info.lpECB->cbAvailable, max_bytes);
176: memcpy(buf, SAPI_info.lpECB->lpbData, read_from_buf);
1.1 paf 177: total_read+=read_from_buf;
178:
179: if(read_from_buf<max_bytes &&
1.83 paf 180: read_from_buf<SAPI_info.lpECB->cbTotalBytes) {
1.1 paf 181: DWORD cbRead=0, cbSize;
182:
1.3 paf 183: read_from_input=min(max_bytes-read_from_buf,
1.83 paf 184: SAPI_info.lpECB->cbTotalBytes-read_from_buf);
1.1 paf 185: while(cbRead < read_from_input) {
186: cbSize=read_from_input - cbRead;
1.83 paf 187: if(!SAPI_info.lpECB->ReadClient(SAPI_info.lpECB->ConnID,
1.3 paf 188: buf+read_from_buf+cbRead, &cbSize) ||
1.1 paf 189: cbSize==0)
190: break;
191: cbRead+=cbSize;
192: }
193: total_read+=cbRead;
194: }
195: return total_read;
196: }
197:
1.117 moko 198: void SAPI::add_header_attribute(SAPI_Info& SAPI_info, const char* dont_store_key, const char* dont_store_value) {
199: if(strcasecmp(dont_store_key, "location")==0)
1.83 paf 200: SAPI_info.http_response_code=302;
201:
1.117 moko 202: if(strcasecmp(dont_store_key, HTTP_STATUS)==0)
203: SAPI_info.http_response_code=atoi(dont_store_value);
1.83 paf 204: else
1.102 misha 205: (*SAPI_info.header) << capitalize(dont_store_key) << ": " << pa_strdup(dont_store_value) << "\r\n";
1.1 paf 206: }
207:
1.23 paf 208: /// @todo intelligent cache-control
1.83 paf 209: void SAPI::send_header(SAPI_Info& SAPI_info) {
1.64 paf 210: HSE_SEND_HEADER_EX_INFO header_info;
1.1 paf 211:
212: char status_buf[MAX_STATUS_LENGTH];
1.83 paf 213: switch(SAPI_info.http_response_code) {
1.1 paf 214: case 200:
215: header_info.pszStatus="200 OK";
216: break;
217: case 302:
218: header_info.pszStatus="302 Moved Temporarily";
219: break;
1.8 paf 220: case 401:// useless untill parser auth mech
1.1 paf 221: header_info.pszStatus="401 Authorization Required";
1.8 paf 222: break;
1.1 paf 223: default:
1.3 paf 224: snprintf(status_buf, MAX_STATUS_LENGTH,
1.83 paf 225: "%d Undescribed", SAPI_info.http_response_code);
1.1 paf 226: header_info.pszStatus=status_buf;
227: break;
228: }
229: header_info.cchStatus=strlen(header_info.pszStatus);
1.83 paf 230: *SAPI_info.header << "\r\n"; // ISAPI v<5 did quite well without it
231: header_info.pszHeader=SAPI_info.header->cstr();
232: header_info.cchHeader=SAPI_info.header->length();
1.5 paf 233: header_info.fKeepConn=true;
1.1 paf 234:
1.83 paf 235: SAPI_info.lpECB->dwHttpStatusCode=SAPI_info.http_response_code;
1.1 paf 236:
1.83 paf 237: SAPI_info.lpECB->ServerSupportFunction(SAPI_info.lpECB->ConnID,
1.3 paf 238: HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 239: }
240:
1.91 paf 241: size_t SAPI::send_body(SAPI_Info& SAPI_info, const void *buf, size_t size) {
1.1 paf 242: DWORD num_bytes=size;
1.91 paf 243: if(!SAPI_info.lpECB->WriteClient(SAPI_info.lpECB->ConnID,
244: const_cast<void *>(buf), &num_bytes, HSE_IO_SYNC))
245: return 0;
246: return (size_t)num_bytes;
1.1 paf 247: }
1.16 paf 248:
1.1 paf 249:
1.15 paf 250: static bool parser_init() {
1.1 paf 251: static bool globals_inited=false;
252: if(globals_inited)
1.15 paf 253: return true;
1.1 paf 254: globals_inited=true;
255:
1.53 parser 256: try {
1.111 moko 257: // init libraries
1.83 paf 258: pa_globals_init();
1.15 paf 259: // successful finish
260: return true;
1.96 paf 261: } catch(.../*const Exception& e*/) { // global problem
1.15 paf 262: // unsuccessful finish
263: return false;
1.1 paf 264: }
265: }
266:
1.89 paf 267: static void parser_done() {
1.111 moko 268: // finalize libraries
1.89 paf 269: pa_globals_done();
270: }
271:
1.1 paf 272: /// ISAPI //
273: BOOL WINAPI GetExtensionVersion(HSE_VERSION_INFO *pVer) {
274: pVer->dwExtensionVersion = HSE_VERSION;
1.121 moko 275: strncpy(pVer->lpszExtensionDesc, "Parser " PARSER_VERSION, HSE_MAX_EXT_DLL_NAME_LEN-1);
1.36 parser 276: pVer->lpszExtensionDesc[HSE_MAX_EXT_DLL_NAME_LEN-1]=0;
1.15 paf 277: return parser_init();
1.89 paf 278: }
279: // dwFlags & HSE_TERM_MUST_UNLOAD means we can't return false
280: BOOL WINAPI TerminateExtension(
281: DWORD /*dwFlags*/
282: )
283: {
284: parser_done();
285:
286: return TRUE;
1.1 paf 287: }
288:
1.6 paf 289: /**
290: ISAPI // main workhorse
291:
1.23 paf 292: @todo
1.10 paf 293: IIS: remove trailing default-document[index.html] from $request.uri.
294: to do that we need to consult metabase,
1.12 paf 295: wich is tested&works but seems slow runtime
296: and not could-be-quickly-implemented if prepared.
1.37 parser 297: @test
298: PARSER_VERSION from outside
1.6 paf 299: */
1.83 paf 300: void real_parser_handler(SAPI_Info& SAPI_info, bool header_only) {
1.88 paf 301: // collect garbage from prev request
1.122 moko 302: PA_GC_GCOLLECT;
1.88 paf 303:
1.83 paf 304: SAPI_info.header=new String;
305: LPEXTENSION_CONTROL_BLOCK lpECB=SAPI_info.lpECB;
1.53 parser 306:
307: // Request info
1.83 paf 308: Request_info request_info; memset(&request_info, 0, sizeof(request_info));
1.53 parser 309:
310: size_t path_translated_buf_size=strlen(lpECB->lpszPathTranslated)+1;
1.83 paf 311: char *filespec_to_process=pa_strdup(lpECB->lpszPathTranslated, path_translated_buf_size);
1.53 parser 312: #ifdef WIN32
313: back_slashes_to_slashes(filespec_to_process);
314: #endif
315:
1.107 moko 316: if(const char* path_info=SAPI::Env::get(SAPI_info, "PATH_INFO")) {
1.53 parser 317: // IIS
318: size_t len=strlen(filespec_to_process)-strlen(path_info);
1.83 paf 319: char *buf=new(PointerFreeGC) char[len+1];
1.53 parser 320: strncpy(buf, filespec_to_process, len); buf[len]=0;
321: request_info.document_root=buf;
322: } else
1.120 moko 323: throw Exception(PARSER_RUNTIME, 0, "ISAPI: no PATH_INFO defined (in reinventing DOCUMENT_ROOT)");
1.53 parser 324:
325: request_info.path_translated=filespec_to_process;
326: request_info.method=lpECB->lpszMethod;
327: request_info.query_string=lpECB->lpszQueryString;
1.120 moko 328: request_info.uri=lpECB->lpszQueryString && *lpECB->lpszQueryString ? pa_strcat(lpECB->lpszPathInfo, "?", lpECB->lpszQueryString) : lpECB->lpszPathInfo;
1.53 parser 329: request_info.content_type=lpECB->lpszContentType;
330: request_info.content_length=lpECB->cbTotalBytes;
1.107 moko 331: request_info.cookie=SAPI::Env::get(SAPI_info, "HTTP_COOKIE");
1.76 paf 332: request_info.mail_received=false;
1.53 parser 333:
334: // prepare to process request
1.119 moko 335: Request request(SAPI_info, request_info, String::Language(String::L_HTML|String::L_OPTIMIZE_BIT));
1.53 parser 336:
1.65 paf 337: // beside by binary
1.75 paf 338: static char beside_binary_path[MAX_STRING];
339: strncpy(beside_binary_path, argv0, MAX_STRING-1); beside_binary_path[MAX_STRING-1]=0; // filespec of my binary
1.119 moko 340: if(!(rsplit(beside_binary_path, '/') || rsplit(beside_binary_path, '\\'))) { // strip filename
1.65 paf 341: // no path, just filename
1.75 paf 342: beside_binary_path[0]='.'; beside_binary_path[1]=0;
1.119 moko 343: }
1.74 paf 344: char config_filespec[MAX_STRING];
1.119 moko 345: snprintf(config_filespec, MAX_STRING, "%s/%s", beside_binary_path, AUTO_FILE_NAME);
1.65 paf 346:
1.53 parser 347: // process the request
1.119 moko 348: request.core(entry_exists(config_filespec) ? config_filespec : NULL, header_only);
1.53 parser 349: }
350:
1.92 paf 351: #ifdef PA_SUPPRESS_SYSTEM_EXCEPTION
1.113 moko 352: static const Exception call_real_parser_handler__do_PEH_return_it(SAPI_Info& SAPI_info, bool header_only) {
1.92 paf 353: try {
354: real_parser_handler(SAPI_info, header_only);
355: } catch(const Exception& e) {
356: return e;
357: }
358:
359: return Exception();
360: }
1.113 moko 361:
362: static void call_real_parser_handler__supress_system_exception(SAPI_Info& SAPI_info, bool header_only) {
1.92 paf 363: Exception parser_exception;
1.53 parser 364: LPEXCEPTION_POINTERS system_exception=0;
1.92 paf 365:
1.53 parser 366: __try {
1.113 moko 367: parser_exception=call_real_parser_handler__do_PEH_return_it(SAPI_info, header_only);
368: } __except ( (system_exception=GetExceptionInformation()), EXCEPTION_EXECUTE_HANDLER) {
1.53 parser 369: if(system_exception)
370: if(_EXCEPTION_RECORD *er=system_exception->ExceptionRecord)
1.113 moko 371: throw Exception("system", 0, "0x%08X at 0x%08X", er->ExceptionCode, er->ExceptionAddress);
1.53 parser 372: else
1.113 moko 373: throw Exception("system", 0, "<no exception record>");
1.92 paf 374: else
1.113 moko 375: throw Exception("system", 0, "<no exception information>");
1.53 parser 376: }
1.92 paf 377:
378: if(parser_exception)
379: throw Exception(parser_exception);
380: }
1.53 parser 381: #endif
382:
1.83 paf 383: DWORD WINAPI HttpExtensionProc(LPEXTENSION_CONTROL_BLOCK lpECB) {
384: //_asm int 3;
385: SAPI_Info SAPI_info={
1.15 paf 386: lpECB,
1.83 paf 387: 0, // filling later: so that if there would be error pool would have SAPI_info
1.80 paf 388: 200 // default http_response_code [lpECB->dwHttpStatusCode seems to be always 0, even on 404 redirect to /404.html]
1.15 paf 389: };
1.71 paf 390:
1.1 paf 391: bool header_only=strcasecmp(lpECB->lpszMethod, "HEAD")==0;
1.53 parser 392: try { // global try
1.92 paf 393: #ifdef PA_SUPPRESS_SYSTEM_EXCEPTION
394: call_real_parser_handler__supress_system_exception(
395: #else
396: real_parser_handler(
397: #endif
398: SAPI_info, header_only);
1.2 paf 399: // successful finish
1.116 moko 400: } catch(const Exception& e) { // exception in unhandled exception
1.16 paf 401: // log it
1.116 moko 402: SAPI::log(SAPI_info, "%s", e.comment());
1.12 paf 403:
404: HSE_SEND_HEADER_EX_INFO header_info;
405: header_info.pszStatus="200 OK";
406: header_info.cchStatus=strlen(header_info.pszStatus);
1.116 moko 407: header_info.pszHeader=HTTP_CONTENT_TYPE_CAPITALIZED ": text/plain\r\n\r\n";
408: header_info.cchHeader=strlen(header_info.pszHeader);
1.12 paf 409: header_info.fKeepConn=true;
410:
1.1 paf 411: // send header
1.12 paf 412: lpECB->dwHttpStatusCode=200;
1.116 moko 413: lpECB->ServerSupportFunction(lpECB->ConnID, HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 414:
415: // send body
416: if(!header_only)
1.116 moko 417: SAPI::send_body(SAPI_info, e.comment(), strlen(e.comment()));
1.1 paf 418:
419: // unsuccessful finish
420: }
1.71 paf 421: return HSE_STATUS_SUCCESS_AND_KEEP_CONN;
1.1 paf 422: }
1.65 paf 423:
424: BOOL WINAPI DllMain(
425: HINSTANCE hinstDLL, // handle to the DLL module
1.85 paf 426: DWORD /*fdwReason*/, // reason for calling function
427: LPVOID /*lpvReserved*/ // reserved
1.65 paf 428: ) {
429:
430: GetModuleFileName(
431: hinstDLL, // handle to module
432: argv0, // file name of module
433: sizeof(argv0) // size of buffer
434: );
435:
436: return TRUE;
437: }
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