Annotation of parser3/src/targets/cgi/parser3.C, revision 1.55
1.27 paf 1: /** @file
2: Parser: scripting and CGI main.
3:
1.43 paf 4: Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com)
1.27 paf 5:
1.43 paf 6: Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)
1.1 paf 7:
1.55 ! paf 8: $Id: parser3.C,v 1.54 2001/04/03 07:02:44 paf Exp $
1.1 paf 9: */
10:
1.40 paf 11: #include "pa_config_includes.h"
1.3 paf 12:
13: #ifdef WIN32
14: # include <windows.h>
15: #endif
1.27 paf 16:
17: #include <io.h>
1.3 paf 18: #include <stdlib.h>
1.4 paf 19: #include <stdio.h>
20: #include <fcntl.h>
1.45 paf 21: #include <time.h>
1.3 paf 22:
1.37 paf 23: #include "pa_sapi.h"
1.24 paf 24: #include "pa_common.h"
1.5 paf 25: #include "pa_globals.h"
1.2 paf 26: #include "pa_request.h"
1.1 paf 27:
1.42 paf 28: /// IIS refuses to read bigger chunks
29: const size_t READ_POST_CHUNK_SIZE=0x400*0x400; // 1M
30:
1.45 paf 31: const char *argv0;
1.42 paf 32: Pool pool(0); // global pool [dont describe to doxygen: it confuses it with param names]
1.27 paf 33: bool cgi; ///< we were started as CGI?
1.5 paf 34:
1.40 paf 35: #ifdef WIN32
36: /// global system errors into parser exceptions converter
1.43 paf 37: static LONG WINAPI TopLevelExceptionFilter(struct _EXCEPTION_POINTERS *ExceptionInfo) {
1.5 paf 38: char buf[MAX_STRING];
39: if(ExceptionInfo && ExceptionInfo->ExceptionRecord) {
1.36 paf 40: struct _EXCEPTION_RECORD *er=ExceptionInfo->ExceptionRecord;
1.46 paf 41: snprintf(buf, MAX_STRING, "Exception 0x%X at %p",
1.31 paf 42: er->ExceptionCode,
43: er->ExceptionAddress);
1.5 paf 44: } else
45: strcpy(buf, "Exception <unknown>");
46:
47: PTHROW(0, 0,
48: 0,
49: buf);
50:
51: return EXCEPTION_EXECUTE_HANDLER; // never reached
52: }
1.27 paf 53: #endif
54:
1.46 paf 55: // SAPI
1.37 paf 56: const char *SAPI::get_env(Pool& pool, const char *name) {
1.28 paf 57: return getenv(name);
58: }
59:
1.37 paf 60: uint SAPI::read_post(Pool& pool, char *buf, uint max_bytes) {
1.36 paf 61: uint read_size=0;
1.12 paf 62: do {
1.36 paf 63: int chunk_size=read(fileno(stdin),
1.42 paf 64: buf+read_size, min(READ_POST_CHUNK_SIZE, max_bytes-read_size));
1.12 paf 65: if(chunk_size<0)
66: break;
67: read_size+=chunk_size;
68: } while(read_size<max_bytes);
69:
70: return read_size;
1.10 paf 71: }
72:
1.37 paf 73: void SAPI::add_header_attribute(Pool& pool, const char *key, const char *value) {
1.20 paf 74: if(cgi)
75: printf("%s: %s\n", key, value);
1.19 paf 76: }
77:
1.48 paf 78: /// @todo parser4: intelligent cache-control
1.37 paf 79: void SAPI::send_header(Pool& pool) {
1.33 paf 80: if(cgi) {
1.55 ! paf 81: puts("expires: Fri, 23 Mar 2001 09:32:23 GMT");
1.33 paf 82:
83: // header | body delimiter
1.20 paf 84: puts("");
1.33 paf 85: }
1.30 paf 86: }
1.20 paf 87:
1.53 paf 88: void SAPI::send_body(Pool& pool, const void *buf, size_t size) {
1.19 paf 89: stdout_write(buf, size);
1.17 paf 90: }
1.44 paf 91:
1.46 paf 92: // appends to parser3.log located beside my binary
1.44 paf 93: void SAPI::log(Pool& pool, const char *fmt, ...) {
1.45 paf 94: bool opened;
95: FILE *f=0;
96:
97: if(argv0) {
98: // beside by binary
99: char file_spec[MAX_STRING];
100: strncpy(file_spec, argv0, MAX_STRING); // filespec of my binary
101: rsplit(file_spec, '/'); rsplit(file_spec, '\\');// strip filename
102: strcat(file_spec, "/parser3.log");
103: f=fopen(file_spec, "at");
104: }
105: opened=f!=0;
106: if(!opened)
107: f=stderr;
108:
109: // prefix
110: time_t t=time(0);
111: const char *stamp=ctime(&t);
112: fprintf(f, "[%.*s] ", strlen(stamp)-1, stamp);
113: // message
114: va_list args;
115: va_start(args,fmt);
116: vfprintf(f, fmt, args);
117: va_end(args);
118: // newline
119: fprintf(f, "\n");
120:
121: if(opened)
1.44 paf 122: fclose(f);
123: }
1.30 paf 124:
1.40 paf 125: /**
126: main workhorse
1.19 paf 127:
1.48 paf 128: @todo parser4:
1.40 paf 129: IIS: remove trailing default-document[index.html] from $request.uri.
130: to do that we need to consult metabase,
131: wich is tested but seems slow.
132: */
1.5 paf 133: int main(int argc, char *argv[]) {
1.45 paf 134: argv0=argv[0];
135:
1.32 paf 136: umask(2);
137:
138: #ifdef WIN32
1.27 paf 139: setmode(fileno(stdin), _O_BINARY);
140: setmode(fileno(stdout), _O_BINARY);
141: setmode(fileno(stderr), _O_BINARY);
1.32 paf 142: #endif
1.12 paf 143:
1.3 paf 144: // were we started as CGI?
1.20 paf 145: cgi=
1.2 paf 146: getenv("SERVER_SOFTWARE") ||
147: getenv("SERVER_NAME") ||
148: getenv("GATEWAY_INTERFACE") ||
149: getenv("REQUEST_METHOD");
1.5 paf 150:
1.10 paf 151: if(!cgi) {
152: if(argc<2) {
1.45 paf 153: printf("Usage: %s <file>\n", argv0?argv0:"parser3");
1.10 paf 154: exit(1);
155: }
156: }
157:
1.26 paf 158: char *filespec_to_process=cgi?getenv("PATH_TRANSLATED"):argv[1];
1.36 paf 159: #ifdef WIN32
1.43 paf 160: back_slashes_to_slashes(filespec_to_process);
1.36 paf 161: #endif
1.10 paf 162:
1.35 paf 163: const char *request_method=getenv("REQUEST_METHOD");
164: bool header_only=request_method && strcasecmp(request_method, "HEAD")==0;
1.5 paf 165: PTRY { // global try
166: // must be first in PTRY{}PCATCH
1.40 paf 167: #ifdef WIN32
1.5 paf 168: SetUnhandledExceptionFilter(&TopLevelExceptionFilter);
169: //TODO: initSocks();
170: #endif
1.2 paf 171:
1.10 paf 172: // init global variables
1.37 paf 173: pa_globals_init(pool);
1.10 paf 174:
1.13 paf 175: if(!filespec_to_process)
176: PTHROW(0, 0,
177: 0,
178: "no file to process");
179:
1.10 paf 180: // Request info
181: Request::Info request_info;
1.39 paf 182: if(cgi) {
1.51 paf 183: if(const char *env_document_root=SAPI::get_env(pool, "DOCUMENT_ROOT"))
1.39 paf 184: request_info.document_root=env_document_root;
1.51 paf 185: else if(const char *path_info=SAPI::get_env(pool, "PATH_INFO")) {
1.40 paf 186: // IIS
1.39 paf 187: size_t len=strlen(filespec_to_process)-strlen(path_info);
1.40 paf 188: char *buf=(char *)pool.malloc(len+1);
189: strncpy(buf, filespec_to_process, len);
1.39 paf 190: buf[len]=0;
191: request_info.document_root=buf;
192: } else
193: PTHROW(0, 0,
194: 0,
1.43 paf 195: "CGI: no PATH_INFO defined(in reinventing DOCUMENT_ROOT)");
1.39 paf 196: } else {
197: static char buf[MAX_STRING];
198: strncpy(buf, filespec_to_process, MAX_STRING);
199: rsplit(buf, '/'); rsplit(buf, '\\');// strip filename
200: request_info.document_root=buf;
1.13 paf 201: }
1.10 paf 202: request_info.path_translated=filespec_to_process;
1.35 paf 203: request_info.method=request_method;
1.51 paf 204: const char *query_string=SAPI::get_env(pool, "QUERY_STRING");
1.40 paf 205: request_info.query_string=query_string;
1.42 paf 206: if(cgi)
1.51 paf 207: if(const char *env_request_uri=SAPI::get_env(pool, "REQUEST_URI"))
1.42 paf 208: request_info.uri=env_request_uri;
1.51 paf 209: else if(const char *path_info=SAPI::get_env(pool, "PATH_INFO"))
1.42 paf 210: if(query_string) {
211: char *reconstructed_uri=(char *)malloc(
212: strlen(path_info)+1/*'?'*/+
213: strlen(query_string)+1/*0*/);
214: strcpy(reconstructed_uri, path_info);
215: strcat(reconstructed_uri, "?");
216: strcat(reconstructed_uri, query_string);
217: request_info.uri=reconstructed_uri;
218: } else
219: request_info.uri=path_info;
220: else
221: PTHROW(0, 0,
222: 0,
1.43 paf 223: "CGI: no PATH_INFO defined(in reinventing REQUEST_URI)");
1.42 paf 224: else
225: request_info.uri=0;
1.40 paf 226:
1.51 paf 227: request_info.content_type=SAPI::get_env(pool, "CONTENT_TYPE");
228: const char *content_length=SAPI::get_env(pool, "CONTENT_LENGTH");
1.10 paf 229: request_info.content_length=(content_length?atoi(content_length):0);
1.51 paf 230: request_info.cookie=SAPI::get_env(pool, "HTTP_COOKIE");
231: request_info.user_agent=SAPI::get_env(pool, "HTTP_USER_AGENT");
1.10 paf 232:
1.5 paf 233: // prepare to process request
1.38 paf 234: Request request(pool,
1.10 paf 235: request_info,
1.54 paf 236: 1||cgi ? String::UL_HTML_TYPO : String::UL_CLEAN
1.5 paf 237: );
238:
239: // some root-controlled location
1.3 paf 240: #ifdef WIN32
1.10 paf 241: // c:\windows
1.36 paf 242: static char root_auto_path[MAX_STRING];
1.30 paf 243: GetWindowsDirectory(root_auto_path, MAX_STRING);
1.3 paf 244: #else
1.40 paf 245: // ~nobody todo: figure out a better place
1.51 paf 246: char *root_auto_path=SAPI::get_env(pool, "HOME");
1.5 paf 247: #endif
248:
249: // beside by binary
1.36 paf 250: static char site_auto_path[MAX_STRING];
1.30 paf 251: strncpy(site_auto_path, argv[0], MAX_STRING); // filespec of my binary
252: rsplit(site_auto_path, '/'); rsplit(site_auto_path, '\\');// strip filename
1.5 paf 253:
254: // process the request
1.35 paf 255: request.core(
1.30 paf 256: root_auto_path, false,
1.31 paf 257: site_auto_path, false,
1.35 paf 258: header_only);
1.16 paf 259:
1.22 paf 260: // must be last in PTRY{}PCATCH
1.40 paf 261: #ifdef WIN32
1.5 paf 262: SetUnhandledExceptionFilter(0);
1.25 paf 263: #endif
1.16 paf 264: // successful finish
265: return 0;
266: } PCATCH(e) { // global problem
1.43 paf 267: // must be first in PCATCH{}
268: #ifdef WIN32
269: SetUnhandledExceptionFilter(0);
270: #endif
1.44 paf 271: // don't allocate anything on pool here:
272: // possible pool' exception not catch-ed now
273: // and there could be out-of-memory exception
1.43 paf 274:
1.19 paf 275: const char *body=e.comment();
1.44 paf 276: // log it
277: SAPI::log(pool, "exception in request exception handler: %s", body);
278:
279: //
1.19 paf 280: int content_length=strlen(body);
1.5 paf 281:
1.35 paf 282: // prepare header
1.37 paf 283: SAPI::add_header_attribute(pool, "content-type", "text/plain");
1.19 paf 284: char content_length_cstr[MAX_NUMBER];
1.34 paf 285: snprintf(content_length_cstr, MAX_NUMBER, "%lu", content_length);
1.37 paf 286: SAPI::add_header_attribute(pool, "content-length", content_length_cstr);
1.35 paf 287:
288: // send header
1.37 paf 289: SAPI::send_header(pool);
1.19 paf 290:
291: // body
1.35 paf 292: if(!header_only)
1.37 paf 293: SAPI::send_body(pool, body, content_length);
1.2 paf 294:
1.16 paf 295: // unsuccessful finish
296: return 1;
297: }
298: PEND_CATCH
1.1 paf 299: }
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