Annotation of parser3/src/targets/isapi/parser3isapi.C, revision 1.25
1.1 paf 1: #ifndef _MSC_VER
1.10 paf 2: # error compile ISAPI module with MSVC [no urge for now to make it autoconf-ed (PAF)]
1.1 paf 3: #endif
4:
5: #include <windows.h>
6: #include <process.h>
7:
8: #include <httpext.h>
9:
1.9 paf 10: #include "pa_sapi.h"
1.1 paf 11: #include "pa_globals.h"
12: #include "pa_request.h"
13: #include "pa_version.h"
1.13 paf 14: #include "pool_storage.h"
1.24 paf 15: #include "pa_socks.h"
16:
17: /// @todo init_socks
1.1 paf 18:
19: #define MAX_STATUS_LENGTH sizeof("xxxx LONGEST STATUS DESCRIPTION")
20:
1.18 paf 21: // SAPI
22:
23: /**
24: ISAPI SAPI functions receive this context information.
25:
26: @see Pool::set_context
27: */
1.15 paf 28: struct SAPI_func_context {
1.3 paf 29: LPEXTENSION_CONTROL_BLOCK lpECB;
30: String *header;
31: DWORD http_response_code;
32: };
33:
1.9 paf 34: const char *SAPI::get_env(Pool& pool, const char *name) {
1.15 paf 35: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
1.1 paf 36:
37: char *variable_buf=(char *)pool.malloc(MAX_STRING);
38: DWORD variable_len = MAX_STRING-1;
39:
1.3 paf 40: if(ctx.lpECB->GetServerVariable(ctx.lpECB->ConnID, const_cast<char *>(name),
1.1 paf 41: variable_buf, &variable_len)) {
42: variable_buf[variable_len]=0;
43: return variable_buf;
1.7 paf 44: } else if (GetLastError()==ERROR_INSUFFICIENT_BUFFER) {
45: variable_buf=(char *)pool.malloc(variable_len+1);
46:
47: if(ctx.lpECB->GetServerVariable(ctx.lpECB->ConnID, const_cast<char *>(name),
48: variable_buf, &variable_len)) {
49: variable_buf[variable_len]=0;
50: return variable_buf;
51: }
1.1 paf 52: }
1.7 paf 53:
1.1 paf 54: return 0;
55: }
56:
1.25 ! paf 57: size_t SAPI::read_post(Pool& pool, void *buf, size_t max_bytes) {
1.15 paf 58: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
1.1 paf 59:
60: DWORD read_from_buf=0;
61: DWORD read_from_input=0;
62: DWORD total_read=0;
63:
1.3 paf 64: read_from_buf=min(ctx.lpECB->cbAvailable, max_bytes);
65: memcpy(buf, ctx.lpECB->lpbData, read_from_buf);
1.1 paf 66: total_read+=read_from_buf;
67:
68: if(read_from_buf<max_bytes &&
1.3 paf 69: read_from_buf<ctx.lpECB->cbTotalBytes) {
1.1 paf 70: DWORD cbRead=0, cbSize;
71:
1.3 paf 72: read_from_input=min(max_bytes-read_from_buf,
73: ctx.lpECB->cbTotalBytes-read_from_buf);
1.1 paf 74: while(cbRead < read_from_input) {
75: cbSize=read_from_input - cbRead;
1.3 paf 76: if(!ctx.lpECB->ReadClient(ctx.lpECB->ConnID,
77: buf+read_from_buf+cbRead, &cbSize) ||
1.1 paf 78: cbSize==0)
79: break;
80: cbRead+=cbSize;
81: }
82: total_read+=cbRead;
83: }
84: return total_read;
85: }
86:
1.9 paf 87: void SAPI::add_header_attribute(Pool& pool, const char *key, const char *value) {
1.15 paf 88: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
1.3 paf 89:
90: if(strcasecmp(key, "location")==0)
91: ctx.http_response_code=302;
92:
93: if(strcasecmp(key, "status")==0)
94: ctx.http_response_code=atoi(value);
95: else {
96: ctx.header->APPEND_CONST(key);
97: ctx.header->APPEND_CONST(": ");
98: ctx.header->APPEND_CONST(value);
99: ctx.header->APPEND_CONST("\n");
100: }
1.1 paf 101: }
102:
1.23 paf 103: /// @todo intelligent cache-control
1.9 paf 104: void SAPI::send_header(Pool& pool) {
1.15 paf 105: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
1.1 paf 106:
1.6 paf 107: ctx.header->APPEND_CONST(
1.22 paf 108: "expires: Fri, 23 Mar 2001 09:32:23 GMT\n"
1.6 paf 109: "\n");
1.1 paf 110: HSE_SEND_HEADER_EX_INFO header_info;
111:
112: char status_buf[MAX_STATUS_LENGTH];
1.3 paf 113: switch(ctx.http_response_code) {
1.1 paf 114: case 200:
115: header_info.pszStatus="200 OK";
116: break;
117: case 302:
118: header_info.pszStatus="302 Moved Temporarily";
119: break;
1.8 paf 120: case 401:// useless untill parser auth mech
1.1 paf 121: header_info.pszStatus="401 Authorization Required";
1.8 paf 122: break;
1.1 paf 123: default:
1.3 paf 124: snprintf(status_buf, MAX_STATUS_LENGTH,
125: "%d Undescribed", ctx.http_response_code);
1.1 paf 126: header_info.pszStatus=status_buf;
127: break;
128: }
129: header_info.cchStatus=strlen(header_info.pszStatus);
1.3 paf 130: header_info.pszHeader=ctx.header->cstr();
131: header_info.cchHeader=ctx.header->size();
1.5 paf 132: header_info.fKeepConn=true;
1.1 paf 133:
1.3 paf 134: ctx.lpECB->dwHttpStatusCode=ctx.http_response_code;
1.1 paf 135:
1.3 paf 136: ctx.lpECB->ServerSupportFunction(ctx.lpECB->ConnID,
137: HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 138: }
139:
1.23 paf 140: void SAPI::send_body(Pool& pool, const void *buf, size_t size) {
1.15 paf 141: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
1.1 paf 142:
143: DWORD num_bytes=size;
1.3 paf 144: ctx.lpECB->WriteClient(ctx.lpECB->ConnID,
1.23 paf 145: const_cast<void *>(buf), &num_bytes, HSE_IO_SYNC);
1.1 paf 146: }
1.16 paf 147:
1.18 paf 148: // goes to 'cs-uri-query' log file field. webmaster: switch it ON[default OFF].
1.16 paf 149: void SAPI::log(Pool& pool, const char *fmt, ...) {
150: SAPI_func_context& ctx=*static_cast<SAPI_func_context *>(pool.context());
151:
152: va_list args;
153: va_start(args,fmt);
154: char buf[MAX_STRING];
155: const char *prefix="PARSER_ERROR:";
156: strcpy(buf, prefix);
157: DWORD size=vsnprintf(buf+strlen(prefix), MAX_STRING-strlen(prefix), fmt, args);
158:
159: ctx.lpECB->ServerSupportFunction(ctx.lpECB->ConnID,
160: HSE_APPEND_LOG_PARAMETER, buf, &size, 0);
161: }
1.1 paf 162:
163: //
164:
1.15 paf 165: static bool parser_init() {
1.1 paf 166: static bool globals_inited=false;
167: if(globals_inited)
1.15 paf 168: return true;
1.1 paf 169: globals_inited=true;
170:
1.13 paf 171: static Pool pool(0); // global pool
1.1 paf 172: PTRY {
173: // init global variables
1.9 paf 174: pa_globals_init(pool);
1.1 paf 175:
1.15 paf 176: // successful finish
177: return true;
1.1 paf 178: } PCATCH(e) { // global problem
1.15 paf 179: //const char *body=e.comment();
180:
181: // unsuccessful finish
182: return false;
1.1 paf 183: }
184: PEND_CATCH
185: }
186:
187: /// ISAPI //
188: BOOL WINAPI GetExtensionVersion(HSE_VERSION_INFO *pVer) {
189: pVer->dwExtensionVersion = HSE_VERSION;
1.15 paf 190: strncpy(pVer->lpszExtensionDesc, "Parser "PARSER_VERSION, HSE_MAX_EXT_DLL_NAME_LEN);
191: return parser_init();
1.1 paf 192: }
193:
1.6 paf 194: /**
195: ISAPI // main workhorse
196:
1.23 paf 197: @todo
1.10 paf 198: IIS: remove trailing default-document[index.html] from $request.uri.
199: to do that we need to consult metabase,
1.12 paf 200: wich is tested&works but seems slow runtime
201: and not could-be-quickly-implemented if prepared.
1.6 paf 202: */
1.1 paf 203: DWORD WINAPI HttpExtensionProc(LPEXTENSION_CONTROL_BLOCK lpECB) {
1.13 paf 204: Pool_storage pool_storage;
1.15 paf 205: Pool pool(&pool_storage); // no allocations until assigned context [for reporting]
206: SAPI_func_context ctx={
207: lpECB,
1.18 paf 208: 0, // filling later: so that if there would be error pool would have ctx
209: 200
1.15 paf 210: };
211: pool.set_context(&ctx);// no allocations before this line!
1.2 paf 212:
1.1 paf 213: bool header_only=strcasecmp(lpECB->lpszMethod, "HEAD")==0;
214: PTRY { // global try
1.12 paf 215: ctx.header=new(pool) String(pool);
1.3 paf 216:
1.2 paf 217: // Request info
218: Request::Info request_info;
1.14 paf 219:
220: size_t path_translated_buf_size=strlen(lpECB->lpszPathTranslated)+1;
221: char *filespec_to_process=(char *)malloc(path_translated_buf_size);
222: memcpy(filespec_to_process, lpECB->lpszPathTranslated, path_translated_buf_size);
223: #ifdef WIN32
224: back_slashes_to_slashes(filespec_to_process);
225: #endif
226:
1.11 paf 227: if(const char *path_info=SAPI::get_env(pool, "PATH_INFO")) {
228: // IIS
229: size_t len=strlen(filespec_to_process)-strlen(path_info);
230: char *buf=(char *)pool.malloc(len+1);
231: strncpy(buf, filespec_to_process, len);
232: buf[len]=0;
233: request_info.document_root=buf;
234: } else
1.6 paf 235: PTHROW(0, 0,
236: 0,
1.11 paf 237: "ISAPI: no PATH_INFO defined (in reinventing DOCUMENT_ROOT)");
1.6 paf 238:
1.11 paf 239: request_info.path_translated=filespec_to_process;
1.2 paf 240: request_info.method=lpECB->lpszMethod;
241: request_info.query_string=lpECB->lpszQueryString;
242: if(lpECB->lpszQueryString && *lpECB->lpszQueryString) {
1.7 paf 243: char *reconstructed_uri=(char *)malloc(
244: strlen(lpECB->lpszPathInfo)+1/*'?'*/+
245: strlen(lpECB->lpszQueryString)+1/*0*/);
246: strcpy(reconstructed_uri, lpECB->lpszPathInfo);
1.2 paf 247: strcat(reconstructed_uri, "?");
1.7 paf 248: strcat(reconstructed_uri, lpECB->lpszQueryString);
1.2 paf 249: request_info.uri=reconstructed_uri;
250: } else
251: request_info.uri=lpECB->lpszPathInfo;
252:
253: request_info.content_type=lpECB->lpszContentType;
254: request_info.content_length=lpECB->cbTotalBytes;
1.9 paf 255: request_info.cookie=SAPI::get_env(pool, "HTTP_COOKIE");
1.20 paf 256: request_info.user_agent=SAPI::get_env(pool, "HTTP_USER_AGENT");
257:
1.2 paf 258:
259: // prepare to process request
260: Request request(pool,
261: request_info,
262: String::UL_HTML_TYPO
263: );
1.15 paf 264:
1.2 paf 265: // some root-controlled location
1.7 paf 266: // c:\windows
267: // must be dynamic: rethrowing from request.core
268: // may return 'source' which can be inside of 'root auto.p@exeception'
269: char *root_auto_path=(char *)pool.malloc(MAX_STRING);
1.2 paf 270: GetWindowsDirectory(root_auto_path, MAX_STRING);
1.4 paf 271:
1.2 paf 272: // process the request
273: request.core(
274: root_auto_path, false/*may be abcent*/, // /path/to/admin/auto.p
275: 0/*parser_site_auto_path*/, false, // /path/to/site/auto.p
276: header_only);
277: // successful finish
1.12 paf 278: } PCATCH(e) { // global problem
279: // don't allocate anything on pool here:
280: // possible pool' exception not catch-ed now
281: // and there could be out-of-memory exception
1.1 paf 282: const char *body=e.comment();
1.16 paf 283: // log it
284: SAPI::log(pool, "exception in request exception handler: %s", body);
285:
286: //
1.1 paf 287: int content_length=strlen(body);
288:
1.12 paf 289: // prepare header // not using SAPI func wich allocates on pool
290: char header_buf[MAX_STRING];
291: int header_len=snprintf(header_buf, MAX_STRING,
1.22 paf 292: "content-type: text/plain\n"
293: "content-length: %ul\n"
294: "expires: Fri, 23 Mar 2001 09:32:23 GMT\n"
1.12 paf 295: "\n",
296: content_length);
297:
298: HSE_SEND_HEADER_EX_INFO header_info;
299: header_info.pszStatus="200 OK";
300: header_info.cchStatus=strlen(header_info.pszStatus);
301: header_info.pszHeader=header_buf;
302: header_info.cchHeader=header_len;
303: header_info.fKeepConn=true;
304:
1.1 paf 305: // send header
1.12 paf 306: lpECB->dwHttpStatusCode=200;
307: lpECB->ServerSupportFunction(lpECB->ConnID,
308: HSE_REQ_SEND_RESPONSE_HEADER_EX, &header_info, NULL, NULL);
1.1 paf 309:
310: // send body
311: if(!header_only)
1.9 paf 312: SAPI::send_body(pool, body, content_length);
1.1 paf 313:
314: // unsuccessful finish
315: }
316: PEND_CATCH
317:
1.6 paf 318: return HSE_STATUS_SUCCESS_AND_KEEP_CONN;
1.1 paf 319: }
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