Annotation of parser3/src/targets/isapi/parser3isapi.C, revision 1.34
1.29 paf 1: /** @file
2: Parser: IIS extension.
3:
4: Copyright (c) 2000,2001 ArtLebedev Group (http://www.artlebedev.com)
5:
6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
7:
1.34 ! parser 8: $Id: parser3isapi.C,v 1.33 2001/04/28 13:38:23 paf Exp $
1.29 paf 9: */
1.34 ! parser 10: static char *RCSId="$Id$";
1.29 paf 11:
1.1 paf 12: #ifndef _MSC_VER
1.10 paf 13: # error compile ISAPI module with MSVC [no urge for now to make it autoconf-ed (PAF)]
1.1 paf 14: #endif
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:
28: #define MAX_STATUS_LENGTH sizeof("xxxx LONGEST STATUS DESCRIPTION")
29:
1.18 paf 30: // SAPI
31:
32: /**
33: ISAPI SAPI functions receive this context information.
34:
35: @see Pool::set_context
36: */
1.15 paf 37: struct SAPI_func_context {
1.3 paf 38: LPEXTENSION_CONTROL_BLOCK lpECB;
39: String *header;
40: DWORD http_response_code;
41: };
42:
1.26 paf 43: // goes to 'cs-uri-query' log file field. webmaster: switch it ON[default OFF].
44: void SAPI::log(Pool& pool, const char *fmt, ...) {
45: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
46:
47: va_list args;
48: va_start(args,fmt);
49: char buf[MAX_STRING];
50: const char *prefix="PARSER_ERROR:";
51: strcpy(buf, prefix);
52: DWORD size=vsnprintf(buf+strlen(prefix), MAX_STRING-strlen(prefix), fmt, args);
53:
54: ctx.lpECB->ServerSupportFunction(ctx.lpECB->ConnID,
55: HSE_APPEND_LOG_PARAMETER, buf, &size, 0);
56: }
57:
1.9 paf 58: const char *SAPI::get_env(Pool& pool, const char *name) {
1.15 paf 59: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
1.1 paf 60:
61: char *variable_buf=(char *)pool.malloc(MAX_STRING);
62: DWORD variable_len = MAX_STRING-1;
63:
1.3 paf 64: if(ctx.lpECB->GetServerVariable(ctx.lpECB->ConnID, const_cast<char *>(name),
1.1 paf 65: variable_buf, &variable_len)) {
66: variable_buf[variable_len]=0;
67: return variable_buf;
1.7 paf 68: } else if (GetLastError()==ERROR_INSUFFICIENT_BUFFER) {
69: variable_buf=(char *)pool.malloc(variable_len+1);
70:
71: if(ctx.lpECB->GetServerVariable(ctx.lpECB->ConnID, const_cast<char *>(name),
72: variable_buf, &variable_len)) {
73: variable_buf[variable_len]=0;
74: return variable_buf;
75: }
1.1 paf 76: }
1.7 paf 77:
1.1 paf 78: return 0;
79: }
80:
1.26 paf 81: size_t SAPI::read_post(Pool& pool, char *buf, size_t max_bytes) {
1.15 paf 82: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
1.1 paf 83:
84: DWORD read_from_buf=0;
85: DWORD read_from_input=0;
86: DWORD total_read=0;
87:
1.3 paf 88: read_from_buf=min(ctx.lpECB->cbAvailable, max_bytes);
89: memcpy(buf, ctx.lpECB->lpbData, read_from_buf);
1.1 paf 90: total_read+=read_from_buf;
91:
92: if(read_from_buf<max_bytes &&
1.3 paf 93: read_from_buf<ctx.lpECB->cbTotalBytes) {
1.1 paf 94: DWORD cbRead=0, cbSize;
95:
1.3 paf 96: read_from_input=min(max_bytes-read_from_buf,
97: ctx.lpECB->cbTotalBytes-read_from_buf);
1.1 paf 98: while(cbRead < read_from_input) {
99: cbSize=read_from_input - cbRead;
1.3 paf 100: if(!ctx.lpECB->ReadClient(ctx.lpECB->ConnID,
101: buf+read_from_buf+cbRead, &cbSize) ||
1.1 paf 102: cbSize==0)
103: break;
104: cbRead+=cbSize;
105: }
106: total_read+=cbRead;
107: }
108: return total_read;
109: }
110:
1.9 paf 111: void SAPI::add_header_attribute(Pool& pool, const char *key, const char *value) {
1.15 paf 112: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
1.3 paf 113:
114: if(strcasecmp(key, "location")==0)
115: ctx.http_response_code=302;
116:
117: if(strcasecmp(key, "status")==0)
118: ctx.http_response_code=atoi(value);
119: else {
120: ctx.header->APPEND_CONST(key);
121: ctx.header->APPEND_CONST(": ");
122: ctx.header->APPEND_CONST(value);
1.30 paf 123: ctx.header->APPEND_CONST("\r\n");
1.3 paf 124: }
1.1 paf 125: }
126:
1.23 paf 127: /// @todo intelligent cache-control
1.9 paf 128: void SAPI::send_header(Pool& pool) {
1.15 paf 129: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
1.1 paf 130:
1.6 paf 131: ctx.header->APPEND_CONST(
1.30 paf 132: "expires: Fri, 23 Mar 2001 09:32:23 GMT\r\n"
133: "\r\n");
1.1 paf 134: HSE_SEND_HEADER_EX_INFO header_info;
135:
136: char status_buf[MAX_STATUS_LENGTH];
1.3 paf 137: switch(ctx.http_response_code) {
1.1 paf 138: case 200:
139: header_info.pszStatus="200 OK";
140: break;
141: case 302:
142: header_info.pszStatus="302 Moved Temporarily";
143: break;
1.8 paf 144: case 401:// useless untill parser auth mech
1.1 paf 145: header_info.pszStatus="401 Authorization Required";
1.8 paf 146: break;
1.1 paf 147: default:
1.3 paf 148: snprintf(status_buf, MAX_STATUS_LENGTH,
149: "%d Undescribed", ctx.http_response_code);
1.1 paf 150: header_info.pszStatus=status_buf;
151: break;
152: }
153: header_info.cchStatus=strlen(header_info.pszStatus);
1.3 paf 154: header_info.pszHeader=ctx.header->cstr();
155: header_info.cchHeader=ctx.header->size();
1.5 paf 156: header_info.fKeepConn=true;
1.1 paf 157:
1.3 paf 158: ctx.lpECB->dwHttpStatusCode=ctx.http_response_code;
1.1 paf 159:
1.3 paf 160: ctx.lpECB->ServerSupportFunction(ctx.lpECB->ConnID,
161: HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 162: }
163:
1.23 paf 164: void SAPI::send_body(Pool& pool, const void *buf, size_t size) {
1.15 paf 165: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
1.1 paf 166:
167: DWORD num_bytes=size;
1.3 paf 168: ctx.lpECB->WriteClient(ctx.lpECB->ConnID,
1.23 paf 169: const_cast<void *>(buf), &num_bytes, HSE_IO_SYNC);
1.1 paf 170: }
1.16 paf 171:
1.1 paf 172: //
173:
1.15 paf 174: static bool parser_init() {
1.1 paf 175: static bool globals_inited=false;
176: if(globals_inited)
1.15 paf 177: return true;
1.1 paf 178: globals_inited=true;
179:
1.13 paf 180: static Pool pool(0); // global pool
1.1 paf 181: PTRY {
1.27 paf 182: // init socks
183: init_socks(pool);
184:
1.32 paf 185: // init global classes
186: init_methoded_array(pool);
1.1 paf 187: // init global variables
1.9 paf 188: pa_globals_init(pool);
1.1 paf 189:
1.15 paf 190: // successful finish
191: return true;
1.1 paf 192: } PCATCH(e) { // global problem
1.15 paf 193: //const char *body=e.comment();
194:
195: // unsuccessful finish
196: return false;
1.1 paf 197: }
198: PEND_CATCH
199: }
200:
201: /// ISAPI //
202: BOOL WINAPI GetExtensionVersion(HSE_VERSION_INFO *pVer) {
203: pVer->dwExtensionVersion = HSE_VERSION;
1.15 paf 204: strncpy(pVer->lpszExtensionDesc, "Parser "PARSER_VERSION, HSE_MAX_EXT_DLL_NAME_LEN);
205: return parser_init();
1.1 paf 206: }
207:
1.6 paf 208: /**
209: ISAPI // main workhorse
210:
1.23 paf 211: @todo
1.10 paf 212: IIS: remove trailing default-document[index.html] from $request.uri.
213: to do that we need to consult metabase,
1.12 paf 214: wich is tested&works but seems slow runtime
215: and not could-be-quickly-implemented if prepared.
1.6 paf 216: */
1.1 paf 217: DWORD WINAPI HttpExtensionProc(LPEXTENSION_CONTROL_BLOCK lpECB) {
1.13 paf 218: Pool_storage pool_storage;
1.15 paf 219: Pool pool(&pool_storage); // no allocations until assigned context [for reporting]
220: SAPI_func_context ctx={
221: lpECB,
1.18 paf 222: 0, // filling later: so that if there would be error pool would have ctx
223: 200
1.15 paf 224: };
225: pool.set_context(&ctx);// no allocations before this line!
1.2 paf 226:
1.1 paf 227: bool header_only=strcasecmp(lpECB->lpszMethod, "HEAD")==0;
228: PTRY { // global try
1.12 paf 229: ctx.header=new(pool) String(pool);
1.3 paf 230:
1.2 paf 231: // Request info
232: Request::Info request_info;
1.14 paf 233:
234: size_t path_translated_buf_size=strlen(lpECB->lpszPathTranslated)+1;
235: char *filespec_to_process=(char *)malloc(path_translated_buf_size);
236: memcpy(filespec_to_process, lpECB->lpszPathTranslated, path_translated_buf_size);
237: #ifdef WIN32
238: back_slashes_to_slashes(filespec_to_process);
239: #endif
240:
1.11 paf 241: if(const char *path_info=SAPI::get_env(pool, "PATH_INFO")) {
242: // IIS
243: size_t len=strlen(filespec_to_process)-strlen(path_info);
244: char *buf=(char *)pool.malloc(len+1);
245: strncpy(buf, filespec_to_process, len);
246: buf[len]=0;
247: request_info.document_root=buf;
248: } else
1.6 paf 249: PTHROW(0, 0,
250: 0,
1.11 paf 251: "ISAPI: no PATH_INFO defined (in reinventing DOCUMENT_ROOT)");
1.6 paf 252:
1.11 paf 253: request_info.path_translated=filespec_to_process;
1.2 paf 254: request_info.method=lpECB->lpszMethod;
255: request_info.query_string=lpECB->lpszQueryString;
256: if(lpECB->lpszQueryString && *lpECB->lpszQueryString) {
1.7 paf 257: char *reconstructed_uri=(char *)malloc(
258: strlen(lpECB->lpszPathInfo)+1/*'?'*/+
259: strlen(lpECB->lpszQueryString)+1/*0*/);
260: strcpy(reconstructed_uri, lpECB->lpszPathInfo);
1.2 paf 261: strcat(reconstructed_uri, "?");
1.7 paf 262: strcat(reconstructed_uri, lpECB->lpszQueryString);
1.2 paf 263: request_info.uri=reconstructed_uri;
264: } else
265: request_info.uri=lpECB->lpszPathInfo;
266:
267: request_info.content_type=lpECB->lpszContentType;
268: request_info.content_length=lpECB->cbTotalBytes;
1.9 paf 269: request_info.cookie=SAPI::get_env(pool, "HTTP_COOKIE");
1.20 paf 270: request_info.user_agent=SAPI::get_env(pool, "HTTP_USER_AGENT");
271:
1.2 paf 272:
273: // prepare to process request
274: Request request(pool,
275: request_info,
1.33 paf 276: String::UL_USER_HTML
1.2 paf 277: );
1.15 paf 278:
1.2 paf 279: // some root-controlled location
1.7 paf 280: // c:\windows
281: // must be dynamic: rethrowing from request.core
282: // may return 'source' which can be inside of 'root auto.p@exeception'
283: char *root_auto_path=(char *)pool.malloc(MAX_STRING);
1.2 paf 284: GetWindowsDirectory(root_auto_path, MAX_STRING);
1.4 paf 285:
1.2 paf 286: // process the request
287: request.core(
288: root_auto_path, false/*may be abcent*/, // /path/to/admin/auto.p
289: 0/*parser_site_auto_path*/, false, // /path/to/site/auto.p
290: header_only);
291: // successful finish
1.12 paf 292: } PCATCH(e) { // global problem
293: // don't allocate anything on pool here:
294: // possible pool' exception not catch-ed now
1.31 paf 295: // and there could be out-of-memory exception
1.1 paf 296: const char *body=e.comment();
1.16 paf 297: // log it
298: SAPI::log(pool, "exception in request exception handler: %s", body);
299:
300: //
1.1 paf 301: int content_length=strlen(body);
302:
1.12 paf 303: // prepare header // not using SAPI func wich allocates on pool
304: char header_buf[MAX_STRING];
305: int header_len=snprintf(header_buf, MAX_STRING,
1.30 paf 306: "content-type: text/plain\r\n"
307: "content-length: %lu\r\n"
308: "expires: Fri, 23 Mar 2001 09:32:23 GMT\r\n"
309: "\r\n",
1.12 paf 310: content_length);
311:
312: HSE_SEND_HEADER_EX_INFO header_info;
313: header_info.pszStatus="200 OK";
314: header_info.cchStatus=strlen(header_info.pszStatus);
315: header_info.pszHeader=header_buf;
316: header_info.cchHeader=header_len;
317: header_info.fKeepConn=true;
318:
1.1 paf 319: // send header
1.12 paf 320: lpECB->dwHttpStatusCode=200;
321: lpECB->ServerSupportFunction(lpECB->ConnID,
322: HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 323:
324: // send body
325: if(!header_only)
1.9 paf 326: SAPI::send_body(pool, body, content_length);
1.1 paf 327:
328: // unsuccessful finish
329: }
330: PEND_CATCH
331:
1.6 paf 332: return HSE_STATUS_SUCCESS_AND_KEEP_CONN;
1.1 paf 333: }
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