Annotation of parser3/src/targets/isapi/parser3isapi.C, revision 1.57
1.29 paf 1: /** @file
2: Parser: IIS extension.
3:
4: Copyright (c) 2000,2001 ArtLebedev Group (http://www.artlebedev.com)
1.57 ! paf 5: Author: Alexander Petrosyan <paf@design.ru> (http://paf.design.ru)
1.29 paf 6:
1.57 ! paf 7: $Id: parser3isapi.C,v 1.56 2001/10/24 16:52:25 parser Exp $
1.29 paf 8: */
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:
16: #include <windows.h>
17: #include <process.h>
18:
19: #include <httpext.h>
20:
1.9 paf 21: #include "pa_sapi.h"
1.1 paf 22: #include "pa_globals.h"
23: #include "pa_request.h"
24: #include "pa_version.h"
1.13 paf 25: #include "pool_storage.h"
1.24 paf 26: #include "pa_socks.h"
1.1 paf 27:
1.51 parser 28: #ifdef XML
29: #include <XalanTransformer/XalanCAPI.h>
30: #endif
31:
1.1 paf 32: #define MAX_STATUS_LENGTH sizeof("xxxx LONGEST STATUS DESCRIPTION")
1.44 parser 33:
34: // consts
35:
36: extern const char *main_RCSIds[];
1.46 parser 37: #ifdef USE_SMTP
1.44 parser 38: extern const char *smtp_RCSIds[];
1.45 parser 39: #endif
1.44 parser 40: extern const char *gd_RCSIds[];
41: extern const char *classes_RCSIds[];
42: extern const char *types_RCSIds[];
43: extern const char *parser3isapi_RCSIds[];
1.49 parser 44: #ifdef XML
45: extern const char *xalan_patched_RCSIds[];
46: #endif
1.44 parser 47: const char **RCSIds[]={
48: main_RCSIds,
1.46 parser 49: #ifdef USE_SMTP
1.44 parser 50: smtp_RCSIds,
1.45 parser 51: #endif
1.44 parser 52: gd_RCSIds,
53: classes_RCSIds,
54: types_RCSIds,
55: parser3isapi_RCSIds,
1.48 parser 56: #ifdef XML
57: xalan_patched_RCSIds,
58: #endif
1.44 parser 59: 0
60: };
1.1 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: */
1.15 paf 69: struct SAPI_func_context {
1.3 paf 70: LPEXTENSION_CONTROL_BLOCK lpECB;
71: String *header;
72: DWORD http_response_code;
73: };
1.38 parser 74: #endif
1.3 paf 75:
1.50 parser 76: #ifdef XML
77: /**
78: * Terminate Xalan and Xerces.
79: *
80: * Should be called only once per process after deleting all
81: * instances of XalanTransformer. Once a process has called
82: * this function, it cannot use the API for the remaining
83: * lifetime of the process.
84:
85:
86: this requirement is fullfilled by using Pool::register_cleanup
87: */
88: void callXalanTerminate(void *) {
89: //_asm int 3;
90: XalanTerminate();
91: }
92: #endif
93:
1.26 paf 94: // goes to 'cs-uri-query' log file field. webmaster: switch it ON[default OFF].
95: void SAPI::log(Pool& pool, const char *fmt, ...) {
1.53 parser 96: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.get_context());
1.26 paf 97:
98: va_list args;
99: va_start(args,fmt);
100: char buf[MAX_STRING];
101: const char *prefix="PARSER_ERROR:";
102: strcpy(buf, prefix);
1.47 parser 103: char *start=buf+strlen(prefix);
1.51 parser 104: DWORD size=vsnprintf(start, MAX_STRING-strlen(prefix), fmt, args);
1.47 parser 105: remove_crlf(start, start+size);
106:
1.26 paf 107: ctx.lpECB->ServerSupportFunction(ctx.lpECB->ConnID,
108: HSE_APPEND_LOG_PARAMETER, buf, &size, 0);
1.55 parser 109: }
110:
111: /// @todo event log
1.56 parser 112: void SAPI::die(const char *fmt, ...) {
1.55 parser 113: exit(1);
1.26 paf 114: }
115:
1.9 paf 116: const char *SAPI::get_env(Pool& pool, const char *name) {
1.53 parser 117: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.get_context());
1.1 paf 118:
119: char *variable_buf=(char *)pool.malloc(MAX_STRING);
120: DWORD variable_len = MAX_STRING-1;
121:
1.3 paf 122: if(ctx.lpECB->GetServerVariable(ctx.lpECB->ConnID, const_cast<char *>(name),
1.1 paf 123: variable_buf, &variable_len)) {
124: variable_buf[variable_len]=0;
125: return variable_buf;
1.7 paf 126: } else if (GetLastError()==ERROR_INSUFFICIENT_BUFFER) {
127: variable_buf=(char *)pool.malloc(variable_len+1);
128:
129: if(ctx.lpECB->GetServerVariable(ctx.lpECB->ConnID, const_cast<char *>(name),
130: variable_buf, &variable_len)) {
131: variable_buf[variable_len]=0;
132: return variable_buf;
133: }
1.1 paf 134: }
1.7 paf 135:
1.1 paf 136: return 0;
137: }
138:
1.26 paf 139: size_t SAPI::read_post(Pool& pool, char *buf, size_t max_bytes) {
1.53 parser 140: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.get_context());
1.1 paf 141:
142: DWORD read_from_buf=0;
143: DWORD read_from_input=0;
144: DWORD total_read=0;
145:
1.3 paf 146: read_from_buf=min(ctx.lpECB->cbAvailable, max_bytes);
147: memcpy(buf, ctx.lpECB->lpbData, read_from_buf);
1.1 paf 148: total_read+=read_from_buf;
149:
150: if(read_from_buf<max_bytes &&
1.3 paf 151: read_from_buf<ctx.lpECB->cbTotalBytes) {
1.1 paf 152: DWORD cbRead=0, cbSize;
153:
1.3 paf 154: read_from_input=min(max_bytes-read_from_buf,
155: ctx.lpECB->cbTotalBytes-read_from_buf);
1.1 paf 156: while(cbRead < read_from_input) {
157: cbSize=read_from_input - cbRead;
1.3 paf 158: if(!ctx.lpECB->ReadClient(ctx.lpECB->ConnID,
159: buf+read_from_buf+cbRead, &cbSize) ||
1.1 paf 160: cbSize==0)
161: break;
162: cbRead+=cbSize;
163: }
164: total_read+=cbRead;
165: }
166: return total_read;
167: }
168:
1.9 paf 169: void SAPI::add_header_attribute(Pool& pool, const char *key, const char *value) {
1.53 parser 170: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.get_context());
1.3 paf 171:
172: if(strcasecmp(key, "location")==0)
173: ctx.http_response_code=302;
174:
175: if(strcasecmp(key, "status")==0)
176: ctx.http_response_code=atoi(value);
177: else {
178: ctx.header->APPEND_CONST(key);
179: ctx.header->APPEND_CONST(": ");
180: ctx.header->APPEND_CONST(value);
1.30 paf 181: ctx.header->APPEND_CONST("\r\n");
1.3 paf 182: }
1.1 paf 183: }
184:
1.23 paf 185: /// @todo intelligent cache-control
1.9 paf 186: void SAPI::send_header(Pool& pool) {
1.53 parser 187: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.get_context());
1.1 paf 188:
1.6 paf 189: ctx.header->APPEND_CONST(
1.30 paf 190: "expires: Fri, 23 Mar 2001 09:32:23 GMT\r\n"
191: "\r\n");
1.1 paf 192: HSE_SEND_HEADER_EX_INFO header_info;
193:
194: char status_buf[MAX_STATUS_LENGTH];
1.3 paf 195: switch(ctx.http_response_code) {
1.1 paf 196: case 200:
197: header_info.pszStatus="200 OK";
198: break;
199: case 302:
200: header_info.pszStatus="302 Moved Temporarily";
201: break;
1.8 paf 202: case 401:// useless untill parser auth mech
1.1 paf 203: header_info.pszStatus="401 Authorization Required";
1.8 paf 204: break;
1.1 paf 205: default:
1.3 paf 206: snprintf(status_buf, MAX_STATUS_LENGTH,
207: "%d Undescribed", ctx.http_response_code);
1.1 paf 208: header_info.pszStatus=status_buf;
209: break;
210: }
211: header_info.cchStatus=strlen(header_info.pszStatus);
1.3 paf 212: header_info.pszHeader=ctx.header->cstr();
213: header_info.cchHeader=ctx.header->size();
1.5 paf 214: header_info.fKeepConn=true;
1.1 paf 215:
1.3 paf 216: ctx.lpECB->dwHttpStatusCode=ctx.http_response_code;
1.1 paf 217:
1.3 paf 218: ctx.lpECB->ServerSupportFunction(ctx.lpECB->ConnID,
219: HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 220: }
221:
1.23 paf 222: void SAPI::send_body(Pool& pool, const void *buf, size_t size) {
1.53 parser 223: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.get_context());
1.1 paf 224:
225: DWORD num_bytes=size;
1.3 paf 226: ctx.lpECB->WriteClient(ctx.lpECB->ConnID,
1.23 paf 227: const_cast<void *>(buf), &num_bytes, HSE_IO_SYNC);
1.1 paf 228: }
1.16 paf 229:
1.1 paf 230: //
231:
1.15 paf 232: static bool parser_init() {
1.1 paf 233: static bool globals_inited=false;
234: if(globals_inited)
1.15 paf 235: return true;
1.1 paf 236: globals_inited=true;
237:
1.13 paf 238: static Pool pool(0); // global pool
1.53 parser 239: try {
1.27 paf 240: // init socks
241: init_socks(pool);
242:
1.50 parser 243: #ifdef XML
244: /**
245: * Initialize Xerces and Xalan.
246: *
247: * Should be called only once per process before making
248: * any other API calls.
249: */
250: //_asm int 3;
251: XalanInitialize();
252: pool.register_cleanup(callXalanTerminate, 0);
253: #endif
254:
1.32 paf 255: // init global classes
256: init_methoded_array(pool);
1.1 paf 257: // init global variables
1.9 paf 258: pa_globals_init(pool);
1.1 paf 259:
1.15 paf 260: // successful finish
261: return true;
1.53 parser 262: } catch(const Exception& e) { // global problem
263: const char *body=e.comment();
1.15 paf 264:
265: // unsuccessful finish
266: return false;
1.1 paf 267: }
268: }
269:
270: /// ISAPI //
271: BOOL WINAPI GetExtensionVersion(HSE_VERSION_INFO *pVer) {
272: pVer->dwExtensionVersion = HSE_VERSION;
1.36 parser 273: strncpy(pVer->lpszExtensionDesc, "Parser "PARSER_VERSION, HSE_MAX_EXT_DLL_NAME_LEN-1);
274: pVer->lpszExtensionDesc[HSE_MAX_EXT_DLL_NAME_LEN-1]=0;
1.15 paf 275: return parser_init();
1.1 paf 276: }
277:
1.6 paf 278: /**
279: ISAPI // main workhorse
280:
1.23 paf 281: @todo
1.10 paf 282: IIS: remove trailing default-document[index.html] from $request.uri.
283: to do that we need to consult metabase,
1.12 paf 284: wich is tested&works but seems slow runtime
285: and not could-be-quickly-implemented if prepared.
1.37 parser 286: @test
287: PARSER_VERSION from outside
1.6 paf 288: */
1.53 parser 289:
290: void real_parser_handler(Pool& pool, LPEXTENSION_CONTROL_BLOCK lpECB, bool header_only) {
291: static_cast<SAPI_func_context *>(pool.get_context())->header=new(pool) String(pool);
292:
293: // Request info
294: Request::Info request_info;
295:
296: size_t path_translated_buf_size=strlen(lpECB->lpszPathTranslated)+1;
297: char *filespec_to_process=(char *)pool.malloc(path_translated_buf_size);
298: memcpy(filespec_to_process, lpECB->lpszPathTranslated, path_translated_buf_size);
299: #ifdef WIN32
300: back_slashes_to_slashes(filespec_to_process);
301: #endif
302:
303: if(const char *path_info=SAPI::get_env(pool, "PATH_INFO")) {
304: // IIS
305: size_t len=strlen(filespec_to_process)-strlen(path_info);
306: char *buf=(char *)pool.malloc(len+1);
307: strncpy(buf, filespec_to_process, len); buf[len]=0;
308: request_info.document_root=buf;
309: } else
310: throw Exception(0, 0,
311: 0,
312: "ISAPI: no PATH_INFO defined (in reinventing DOCUMENT_ROOT)");
313:
314: request_info.path_translated=filespec_to_process;
315: request_info.method=lpECB->lpszMethod;
316: request_info.query_string=lpECB->lpszQueryString;
317: if(lpECB->lpszQueryString && *lpECB->lpszQueryString) {
318: char *reconstructed_uri=(char *)pool.malloc(
319: strlen(lpECB->lpszPathInfo)+1/*'?'*/+
320: strlen(lpECB->lpszQueryString)+1/*0*/);
321: strcpy(reconstructed_uri, lpECB->lpszPathInfo);
322: strcat(reconstructed_uri, "?");
323: strcat(reconstructed_uri, lpECB->lpszQueryString);
324: request_info.uri=reconstructed_uri;
325: } else
326: request_info.uri=lpECB->lpszPathInfo;
327:
328: request_info.content_type=lpECB->lpszContentType;
329: request_info.content_length=lpECB->cbTotalBytes;
330: request_info.cookie=SAPI::get_env(pool, "HTTP_COOKIE");
331: request_info.user_agent=SAPI::get_env(pool, "HTTP_USER_AGENT");
332:
333:
334: // prepare to process request
335: Request request(pool,
336: request_info,
337: String::UL_USER_HTML
338: );
339:
340: // some root-controlled location
341: // c:\windows
342: char root_config_path[MAX_STRING];
343: GetWindowsDirectory(root_config_path, MAX_STRING);
344: // must be dynamic: rethrowing from request.core
345: // may return 'source' which can be inside of 'root auto.p@exeception'
346: char *root_config_filespec=(char *)pool.malloc(MAX_STRING);
347: snprintf(root_config_filespec, MAX_STRING,
348: "%s/%s",
349: root_config_path, CONFIG_FILE_NAME);
350:
351: // process the request
352: request.core(
353: root_config_filespec, false/*may be abcent*/, // /path/to/admin/auto.p
354: 0/*parser_site_auto_path*/, false, // /path/to/site/auto.p
355: header_only);
356: }
357:
358: void call_real_parser_handler__do_SEH(Pool& pool,
359: LPEXTENSION_CONTROL_BLOCK lpECB,
360: bool header_only) {
1.54 parser 361: #if _MSC_VER & !defined(_DEBUG)
1.53 parser 362: LPEXCEPTION_POINTERS system_exception=0;
363: __try {
364: #endif
365: real_parser_handler(pool, lpECB, header_only);
366:
1.54 parser 367: #if _MSC_VER & !defined(_DEBUG)
1.53 parser 368: } __except (
369: (system_exception=GetExceptionInformation()),
370: EXCEPTION_EXECUTE_HANDLER) {
371:
372: if(system_exception)
373: if(_EXCEPTION_RECORD *er=system_exception->ExceptionRecord)
374: throw Exception(0, 0,
375: 0,
376: "Exception 0x%08X at 0x%08X", er->ExceptionCode, er->ExceptionAddress);
377: else
378: throw Exception(0, 0, 0, "Exception <no exception record>");
379: else
380: throw Exception(0, 0, 0, "Exception <no exception information>");
381: }
382: #endif
383: }
384:
385:
1.1 paf 386: DWORD WINAPI HttpExtensionProc(LPEXTENSION_CONTROL_BLOCK lpECB) {
1.13 paf 387: Pool_storage pool_storage;
1.15 paf 388: Pool pool(&pool_storage); // no allocations until assigned context [for reporting]
389: SAPI_func_context ctx={
390: lpECB,
1.18 paf 391: 0, // filling later: so that if there would be error pool would have ctx
1.39 parser 392: 200 // default http_response_code
1.15 paf 393: };
394: pool.set_context(&ctx);// no allocations before this line!
1.2 paf 395:
1.50 parser 396: #ifdef XML
397: /**
398: * Initialize Xerces and Xalan.
399: *
400: * Should be called only once per process before making
401: * any other API calls.
402: */
403: //_asm int 3;
404: XalanInitialize();
405: pool.register_cleanup(callXalanTerminate, 0);
406: #endif
407:
408:
1.1 paf 409: bool header_only=strcasecmp(lpECB->lpszMethod, "HEAD")==0;
1.53 parser 410: try { // global try
411: call_real_parser_handler__do_SEH(pool, lpECB, header_only);
1.2 paf 412: // successful finish
1.53 parser 413: } catch(const Exception& e) { // global problem
1.12 paf 414: // don't allocate anything on pool here:
415: // possible pool' exception not catch-ed now
1.31 paf 416: // and there could be out-of-memory exception
1.1 paf 417: const char *body=e.comment();
1.16 paf 418: // log it
419: SAPI::log(pool, "exception in request exception handler: %s", body);
420:
421: //
1.1 paf 422: int content_length=strlen(body);
423:
1.12 paf 424: // prepare header // not using SAPI func wich allocates on pool
425: char header_buf[MAX_STRING];
426: int header_len=snprintf(header_buf, MAX_STRING,
1.30 paf 427: "content-type: text/plain\r\n"
428: "content-length: %lu\r\n"
429: "expires: Fri, 23 Mar 2001 09:32:23 GMT\r\n"
430: "\r\n",
1.12 paf 431: content_length);
432:
433: HSE_SEND_HEADER_EX_INFO header_info;
434: header_info.pszStatus="200 OK";
435: header_info.cchStatus=strlen(header_info.pszStatus);
436: header_info.pszHeader=header_buf;
437: header_info.cchHeader=header_len;
438: header_info.fKeepConn=true;
439:
1.1 paf 440: // send header
1.12 paf 441: lpECB->dwHttpStatusCode=200;
442: lpECB->ServerSupportFunction(lpECB->ConnID,
443: HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 444:
445: // send body
446: if(!header_only)
1.9 paf 447: SAPI::send_body(pool, body, content_length);
1.1 paf 448:
449: // unsuccessful finish
450: }
451:
1.6 paf 452: return HSE_STATUS_SUCCESS_AND_KEEP_CONN;
1.1 paf 453: }
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