Annotation of parser3/src/targets/apache/mod_parser3_core.C, revision 1.3
1.1 moko 1: /** @file
2: Parser: apache 1.3 module, part, compiled by parser3project.
3:
4: Copyright (c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com)
5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
6: */
7:
1.3 ! moko 8: static const char * const IDENT_MOD_PARSER3_MAIN_C="$Date: 2010-11-14 22:44:23 $";
1.1 moko 9:
10: #include "pa_config_includes.h"
11:
12: #include "pa_globals.h"
13:
14: #include "pa_httpd.h"
15:
16: #include "pa_common.h"
17: #include "pa_sapi.h"
18: #include "classes.h"
19: #include "pa_request.h"
20: #include "pa_version.h"
21: #include "pa_socks.h"
22:
23: #if _MSC_VER && !defined(_DEBUG)
24: # include <windows.h>
25: # define PA_SUPPRESS_SYSTEM_EXCEPTION
26: #endif
27:
28: // generals
29:
30: const char* pa_version() {
31: return "Parser/"PARSER_VERSION;
32: }
33:
34: void pa_setup_module_cells() {
35: static bool globals_inited=false;
36: if(globals_inited)
37: return;
38: globals_inited=true;
39:
40: /// no trying to __try here [yet]
41: try {
42: // init socks
43: pa_socks_init();
44:
45: // init global variables
46: pa_globals_init();
47: } catch(const Exception& e) { // global problem
48: SAPI::abort("setup_module_cells failed: %s", e.comment());
49: }
50: }
51:
52: void pa_destroy_module_cells() {
53: pa_globals_done();
54:
55: pa_socks_done();
56: }
57:
58:
59: //@{
60: /// SAPI func decl
61:
62: class SAPI_Info {
63: public:
64: pa_request_rec* r;
65: };
66:
67: void SAPI::log(SAPI_Info& SAPI_info, const char* fmt, ...) {
68: va_list args;
69: va_start(args,fmt);
70: char buf[MAX_LOG_STRING];
71: size_t size=vsnprintf(buf, MAX_LOG_STRING, fmt, args);
72: size=remove_crlf(buf, buf+size);
73: pa_ap_log_rerror(0, 0, PA_APLOG_ERR | PA_APLOG_NOERRNO, SAPI_info.r, "%s", buf);
74: va_end(args);
75: }
76:
77: static void die_or_abort(const char* fmt, va_list args, bool write_core) {
78: char buf[MAX_LOG_STRING];
79: size_t size=vsnprintf(buf, MAX_LOG_STRING, fmt, args);
80: size=remove_crlf(buf, buf+size);
81: pa_ap_log_error(PA_APLOG_MARK, PA_APLOG_EMERG, 0, "%s", buf);
82:
83: // exit & try to produce core dump
84: if(write_core)
85: abort();
86: else
87: exit(1);
88: }
89:
90: void SAPI::die(const char* fmt, ...) {
91: va_list args;
92: va_start(args, fmt);
93: die_or_abort(fmt, args, false/*write core?*/);
94: va_end(args);
95: }
96:
97: void SAPI::abort(const char* fmt, ...) {
98: va_list args;
99: va_start(args, fmt);
100: die_or_abort(fmt, args, true/*write core?*/);
101: va_end(args);
102: }
103:
104: char* SAPI::get_env(SAPI_Info& SAPI_info, const char* name) {
105: const char* dont_return_me=pa_ap_table_get(SAPI_info.r->subprocess_env, name);
106: return dont_return_me?pa_strdup(dont_return_me):0;
107: }
108:
109: #ifndef DOXYGEN
110: struct SAPI_environment_append_info {
111: const char** cur;
112: };
113: #endif
114: static const char* mk_env_pair(const char* key, const char* value) {
115: char *result=new(PointerFreeGC) char[strlen(key)+1/*=*/+strlen(value)+1/*0*/];
116: strcpy(result, key); strcat(result, "="); strcat(result, value);
117: return result;
118: }
119: static int SAPI_environment_append(void *d, const char* k, const char* val) {
120: if( k && val ) {
121: SAPI_environment_append_info& info=
122: *static_cast<SAPI_environment_append_info *>(d);
123: *info.cur++=mk_env_pair(k, val);
124: }
125: return 1/*true*/;
126: }
127: const char* const* SAPI::environment(SAPI_Info& SAPI_info) {
128: const pa_table *t=SAPI_info.r->subprocess_env;
129: const char** result=new(UseGC) const char*[pa_ap_table_size(t)+1/*0*/];
130: SAPI_environment_append_info info={result};
131: pa_ap_table_do(SAPI_environment_append, &info, t, 0); *info.cur=0; // mark EOE
132: return result;
133: }
134:
135: size_t SAPI::read_post(SAPI_Info& SAPI_info, char *buf, size_t max_bytes) {
136: /* pa_ap_log_error(PA_APLOG_MARK, PA_APLOG_DEBUG, SAPI_info.r->server,
137: "mod_parser3: SAPI::read_post(max=%u)", max_bytes);
138: */
139: int retval;
140: if((retval = pa_ap_setup_client_block(SAPI_info.r, PA_REQUEST_CHUNKED_ERROR)))
141: return 0;
142: if(!pa_ap_should_client_block(SAPI_info.r))
143: return 0;
144:
145: uint total_read_bytes=0;
146: void (*handler)(int)=pa_signal(PA_SIGPIPE, PA_SIG_IGN);
147: while (total_read_bytes<max_bytes) {
148: pa_ap_hard_timeout("Read POST information", SAPI_info.r); /* start timeout timer */
149: uint read_bytes=
150: pa_ap_get_client_block(SAPI_info.r, buf+total_read_bytes, max_bytes-total_read_bytes);
151: pa_ap_reset_timeout(SAPI_info.r);
152: if (read_bytes<=0)
153: break;
154: total_read_bytes+=read_bytes;
155: }
156: pa_signal(PA_SIGPIPE, handler);
157: return total_read_bytes;
158: }
159:
160: /// @test location provide with protocol. think about internal redirects
161: void SAPI::add_header_attribute(SAPI_Info& SAPI_info,
162: const char* dont_store_key, const char* dont_store_value) {
163: if(strcasecmp(dont_store_key, "location")==0)
164: *SAPI_info.r->status=302;
165:
166: if(strcasecmp(dont_store_key, HTTP_CONTENT_TYPE)==0) {
167: /* r->content_type, *not* r->headers_out("Content-type"). If you don't
168: * set it, it will be filled in with the server's default type (typically
169: * "text/plain"). You *must* also ensure that r->content_type is lower
170: * case.
171: */
172: *SAPI_info.r->content_type = pa_ap_pstrdup(SAPI_info.r->pool, dont_store_value);
173: } else if(strcasecmp(dont_store_key, HTTP_STATUS)==0)
174: *SAPI_info.r->status=atoi(dont_store_value);
175: else
176: pa_ap_table_addn(SAPI_info.r->headers_out,
177: pa_ap_pstrdup(SAPI_info.r->pool, capitalize(dont_store_key)),
178: pa_ap_pstrdup(SAPI_info.r->pool, dont_store_value));
179: }
180:
181: void SAPI::send_header(SAPI_Info& SAPI_info) {
182: pa_ap_hard_timeout("Send header", SAPI_info.r);
183: pa_ap_send_http_header(SAPI_info.r);
184: pa_ap_kill_timeout(SAPI_info.r);
185: }
186:
187: size_t SAPI::send_body(SAPI_Info& SAPI_info, const void *buf, size_t size) {
188: pa_ap_hard_timeout("Send body", SAPI_info.r);
189: size = (size_t)pa_ap_rwrite(buf, size, SAPI_info.r);
190: pa_ap_kill_timeout(SAPI_info.r);
191: return size;
192: }
193:
194: //@}
195:
196: #if !defined(PA_DEBUG_DISABLE_GC) && !defined(WIN32)
197: extern long GC_large_alloc_warn_suppressed;
198: #endif
199:
200: /**
201: main workhorse
202:
203: @todo intelligent cache-control
204: */
205: static void real_parser_handler(SAPI_Info& SAPI_info, Parser_module_config *dcfg) {
206: // collect garbage from prev request
207: #if !defined(PA_DEBUG_DISABLE_GC) && !defined(WIN32)
208: {
209: int saved=GC_dont_gc;
210: GC_dont_gc=0;
211: GC_gcollect();
212: GC_dont_gc=saved;
213: GC_large_alloc_warn_suppressed=0;
214: }
215: #endif
216:
217: // populate env
218: pa_ap_add_common_vars(SAPI_info.r);
219: pa_ap_add_cgi_vars(SAPI_info.r);
220:
221: // Request info
222: Request_info request_info; memset(&request_info, 0, sizeof(request_info));
223:
224: request_info.document_root=SAPI::get_env(SAPI_info, "DOCUMENT_ROOT");
225: request_info.path_translated=SAPI_info.r->filename;
226: request_info.method=SAPI_info.r->method;
227: request_info.query_string=SAPI_info.r->args;
228: request_info.uri=SAPI::get_env(SAPI_info, "REQUEST_URI");
229: request_info.content_type=SAPI::get_env(SAPI_info, "CONTENT_TYPE");
230: const char* content_length=SAPI::get_env(SAPI_info, "CONTENT_LENGTH");
231: request_info.content_length=content_length?atoi(content_length):0;
232: request_info.cookie=SAPI::get_env(SAPI_info, "HTTP_COOKIE");
233: request_info.mail_received=false;
234:
235: // prepare to process request
236: Request request(
237: SAPI_info,
238: request_info,
1.3 ! moko 239: String::Language(String::L_HTML|String::L_OPTIMIZE_BIT)
1.1 moko 240: );
241:
242: // process the request
243: request.core(
244: dcfg->parser_config_filespec, true, // /path/to/config
245: SAPI_info.r->header_only!=0);
246: }
247:
248: #ifdef PA_SUPPRESS_SYSTEM_EXCEPTION
249: static const Exception
250: call_real_parser_handler__do_PEH_return_it(
251: SAPI_Info& SAPI_info, Parser_module_config *dcfg)
252: {
253: try {
254: real_parser_handler(SAPI_info, dcfg);
255: } catch(const Exception& e) {
256: return e;
257: }
258:
259: return Exception();
260: }
261: static void call_real_parser_handler__supress_system_exception(
262: SAPI_Info& SAPI_info, Parser_module_config *dcfg)
263: {
264: Exception parser_exception;
265: LPEXCEPTION_POINTERS system_exception=0;
266:
267: __try {
268: parser_exception=call_real_parser_handler__do_PEH_return_it(
269: SAPI_info, dcfg);
270: } __except (
271: (system_exception=GetExceptionInformation()),
272: EXCEPTION_EXECUTE_HANDLER)
273: {
274:
275: if(system_exception)
276: if(_EXCEPTION_RECORD *er=system_exception->ExceptionRecord)
277: throw Exception("system",
278: 0,
279: "0x%08X at 0x%08X", er->ExceptionCode, er->ExceptionAddress);
280: else
281: throw Exception("system",
282: 0,
283: "<no exception record>");
284: else
285: throw Exception("system",
286: 0,
287: "<no exception information>");
288: }
289:
290: if(parser_exception)
291: throw Exception(parser_exception);
292: }
293: #endif
294:
295: /// @test r->finfo.st_mode check seems to work only on win32
296: int pa_parser_handler(pa_request_rec *r, Parser_module_config *dcfg) {
297: // SAPI info
298: SAPI_Info SAPI_info; SAPI_info.r=r;
299:
1.2 moko 300: if(r->file_not_found )
1.1 moko 301: return PA_HTTP_NOT_FOUND;
302:
303: try { // global try
304: #ifdef PA_SUPPRESS_SYSTEM_EXCEPTION
305: call_real_parser_handler__supress_system_exception(
306: #else
307: real_parser_handler(
308: #endif
309: SAPI_info, dcfg);
310:
311: // successful finish
312: } catch(const Exception& e) { // global problem
313: // don't allocate anything on pool here:
314: // possible pool' exception not catch-ed now
315: // and there could be out-of-memory exception
316: char buf[MAX_STRING];
317: snprintf(buf, MAX_STRING, "Unhandled exception %s",
318: e.comment());
319: // log it
320: SAPI::log(SAPI_info, "%s", buf);
321:
322: //
323: int content_length=strlen(buf);
324:
325: // prepare header
326: // capitalized headers are used for preventing malloc during capitalization
327: SAPI::add_header_attribute(SAPI_info, HTTP_CONTENT_TYPE_CAPITALIZED, "text/plain");
328: // don't use 'format' function because it calls malloc
329: char content_length_cstr[MAX_NUMBER];
330: snprintf(content_length_cstr, MAX_NUMBER, "%u", content_length);
331: SAPI::add_header_attribute(SAPI_info, HTTP_CONTENT_LENGTH_CAPITALIZED, content_length_cstr);
332:
333: // send header
334: SAPI::send_header(SAPI_info);
335:
336: // send body
337: if(!r->header_only)
338: SAPI::send_body(SAPI_info, buf, content_length);
339:
340: // unsuccessful finish
341: }
342:
343: /*
344: * We did what we wanted to do, so tell the rest of the server we
345: * succeeded.
346: */
347: return PA_OK;
348: }
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