Annotation of parser3/src/targets/cgi/parser3.C, revision 1.97
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: */
1.97 ! parser 8: static const char *RCSId="$Id: parser3.C,v 1.96 2001/08/24 09:27:53 parser Exp $";
1.1 paf 9:
1.40 paf 10: #include "pa_config_includes.h"
1.3 paf 11:
12: #ifdef WIN32
13: # include <windows.h>
14: #endif
1.27 paf 15:
1.37 paf 16: #include "pa_sapi.h"
1.76 paf 17: #include "classes.h"
1.24 paf 18: #include "pa_common.h"
1.2 paf 19: #include "pa_request.h"
1.57 paf 20: #include "pa_socks.h"
1.68 paf 21: #include "pa_version.h"
1.69 paf 22:
1.84 parser 23: //#define DEBUG_POOL_MALLOC
24:
25:
1.42 paf 26: /// IIS refuses to read bigger chunks
27: const size_t READ_POST_CHUNK_SIZE=0x400*0x400; // 1M
28:
1.45 paf 29: const char *argv0;
1.42 paf 30: Pool pool(0); // global pool [dont describe to doxygen: it confuses it with param names]
1.27 paf 31: bool cgi; ///< we were started as CGI?
1.5 paf 32:
1.40 paf 33: #ifdef WIN32
34: /// global system errors into parser exceptions converter
1.43 paf 35: static LONG WINAPI TopLevelExceptionFilter(struct _EXCEPTION_POINTERS *ExceptionInfo) {
1.5 paf 36: char buf[MAX_STRING];
37: if(ExceptionInfo && ExceptionInfo->ExceptionRecord) {
1.36 paf 38: struct _EXCEPTION_RECORD *er=ExceptionInfo->ExceptionRecord;
1.46 paf 39: snprintf(buf, MAX_STRING, "Exception 0x%X at %p",
1.31 paf 40: er->ExceptionCode,
41: er->ExceptionAddress);
1.5 paf 42: } else
43: strcpy(buf, "Exception <unknown>");
44:
45: PTHROW(0, 0,
46: 0,
47: buf);
48:
49: return EXCEPTION_EXECUTE_HANDLER; // never reached
50: }
1.27 paf 51: #endif
52:
1.46 paf 53: // SAPI
1.86 parser 54:
55: // appends to parser3.log located beside my binary if openable, to stderr otherwize
1.61 paf 56: void SAPI::log(Pool& pool, const char *fmt, ...) {
57: bool opened;
58: FILE *f=0;
59:
60: if(argv0) {
61: // beside by binary
62: char file_spec[MAX_STRING];
63: strncpy(file_spec, argv0, MAX_STRING); // filespec of my binary
64: rsplit(file_spec, '/'); rsplit(file_spec, '\\');// strip filename
65: strcat(file_spec, "/parser3.log");
66: f=fopen(file_spec, "at");
67: }
68: opened=f!=0;
69: if(!opened)
70: f=stderr;
71:
72: // prefix
73: time_t t=time(0);
74: const char *stamp=ctime(&t);
75: fprintf(f, "[%.*s] ", strlen(stamp)-1, stamp);
76: // message
77: va_list args;
78: va_start(args,fmt);
79: vfprintf(f, fmt, args);
80: va_end(args);
81: // newline
82: fprintf(f, "\n");
83:
84: if(opened)
85: fclose(f);
1.85 parser 86: else
87: fflush(f);
1.61 paf 88: }
89:
1.37 paf 90: const char *SAPI::get_env(Pool& pool, const char *name) {
1.28 paf 91: return getenv(name);
92: }
93:
1.59 paf 94: size_t SAPI::read_post(Pool& pool, char *buf, size_t max_bytes) {
95: size_t read_size=0;
1.12 paf 96: do {
1.36 paf 97: int chunk_size=read(fileno(stdin),
1.42 paf 98: buf+read_size, min(READ_POST_CHUNK_SIZE, max_bytes-read_size));
1.12 paf 99: if(chunk_size<0)
100: break;
101: read_size+=chunk_size;
102: } while(read_size<max_bytes);
103:
104: return read_size;
1.10 paf 105: }
106:
1.37 paf 107: void SAPI::add_header_attribute(Pool& pool, const char *key, const char *value) {
1.68 paf 108: if(cgi)
1.20 paf 109: printf("%s: %s\n", key, value);
1.19 paf 110: }
111:
1.56 paf 112: /// @todo intelligent cache-control
1.37 paf 113: void SAPI::send_header(Pool& pool) {
1.33 paf 114: if(cgi) {
1.55 paf 115: puts("expires: Fri, 23 Mar 2001 09:32:23 GMT");
1.33 paf 116:
117: // header | body delimiter
1.20 paf 118: puts("");
1.33 paf 119: }
1.30 paf 120: }
1.20 paf 121:
1.53 paf 122: void SAPI::send_body(Pool& pool, const void *buf, size_t size) {
1.19 paf 123: stdout_write(buf, size);
1.58 paf 124: }
125:
1.97 ! parser 126: //
! 127:
! 128: char *full_file_spec(char *file_name) {
! 129: if(!strchr(file_name, '/')) {
! 130: static char cwd[MAX_STRING]; getcwd(cwd, MAX_STRING);
! 131: static char buf[MAX_STRING];
! 132: snprintf(buf, MAX_STRING, "%s/%s", cwd, file_name);
! 133: return buf;
! 134: }
! 135: return file_name;
! 136: }
! 137:
1.40 paf 138: /**
139: main workhorse
1.19 paf 140:
1.56 paf 141: @todo
1.40 paf 142: IIS: remove trailing default-document[index.html] from $request.uri.
143: to do that we need to consult metabase,
144: wich is tested but seems slow.
145: */
1.5 paf 146: int main(int argc, char *argv[]) {
1.45 paf 147: argv0=argv[0];
148:
1.32 paf 149: umask(2);
150:
151: #ifdef WIN32
1.27 paf 152: setmode(fileno(stdin), _O_BINARY);
153: setmode(fileno(stdout), _O_BINARY);
154: setmode(fileno(stderr), _O_BINARY);
1.32 paf 155: #endif
1.12 paf 156:
1.3 paf 157: // were we started as CGI?
1.20 paf 158: cgi=
1.2 paf 159: getenv("SERVER_SOFTWARE") ||
160: getenv("SERVER_NAME") ||
161: getenv("GATEWAY_INTERFACE") ||
162: getenv("REQUEST_METHOD");
1.5 paf 163:
1.10 paf 164: if(!cgi) {
165: if(argc<2) {
1.69 paf 166: printf(
167: "Parser/%s Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com)\n"
168: "Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)\n"
169: "\n"
170: "Usage: %s <file>\n",
171: PARSER_VERSION,
172: argv0?argv0:"parser3");
1.67 paf 173: return 1;
1.10 paf 174: }
175: }
176:
1.26 paf 177: char *filespec_to_process=cgi?getenv("PATH_TRANSLATED"):argv[1];
1.36 paf 178: #ifdef WIN32
1.43 paf 179: back_slashes_to_slashes(filespec_to_process);
1.36 paf 180: #endif
1.97 ! parser 181: filespec_to_process=full_file_spec(filespec_to_process);
1.10 paf 182:
1.35 paf 183: const char *request_method=getenv("REQUEST_METHOD");
184: bool header_only=request_method && strcasecmp(request_method, "HEAD")==0;
1.5 paf 185: PTRY { // global try
186: // must be first in PTRY{}PCATCH
1.40 paf 187: #ifdef WIN32
1.5 paf 188: SetUnhandledExceptionFilter(&TopLevelExceptionFilter);
189: #endif
1.2 paf 190:
1.62 paf 191: // init socks
1.57 paf 192: init_socks(pool);
193:
1.73 paf 194: // init global classes
195: init_methoded_array(pool);
1.10 paf 196: // init global variables
1.37 paf 197: pa_globals_init(pool);
1.10 paf 198:
1.13 paf 199: if(!filespec_to_process)
200: PTHROW(0, 0,
201: 0,
1.68 paf 202: "Parser/%s", PARSER_VERSION);
1.13 paf 203:
1.10 paf 204: // Request info
205: Request::Info request_info;
1.39 paf 206: if(cgi) {
1.51 paf 207: if(const char *env_document_root=SAPI::get_env(pool, "DOCUMENT_ROOT"))
1.39 paf 208: request_info.document_root=env_document_root;
1.51 paf 209: else if(const char *path_info=SAPI::get_env(pool, "PATH_INFO")) {
1.40 paf 210: // IIS
1.39 paf 211: size_t len=strlen(filespec_to_process)-strlen(path_info);
1.40 paf 212: char *buf=(char *)pool.malloc(len+1);
213: strncpy(buf, filespec_to_process, len);
1.39 paf 214: buf[len]=0;
215: request_info.document_root=buf;
216: } else
217: PTHROW(0, 0,
218: 0,
1.43 paf 219: "CGI: no PATH_INFO defined(in reinventing DOCUMENT_ROOT)");
1.39 paf 220: } else {
221: static char buf[MAX_STRING];
222: strncpy(buf, filespec_to_process, MAX_STRING);
1.70 paf 223: if(rsplit(buf, '/') || rsplit(buf, '\\')) // strip filename
224: request_info.document_root=buf;
225: else
226: request_info.document_root="";
1.13 paf 227: }
1.10 paf 228: request_info.path_translated=filespec_to_process;
1.35 paf 229: request_info.method=request_method;
1.51 paf 230: const char *query_string=SAPI::get_env(pool, "QUERY_STRING");
1.40 paf 231: request_info.query_string=query_string;
1.68 paf 232: if(cgi) {
1.51 paf 233: if(const char *env_request_uri=SAPI::get_env(pool, "REQUEST_URI"))
1.42 paf 234: request_info.uri=env_request_uri;
1.51 paf 235: else if(const char *path_info=SAPI::get_env(pool, "PATH_INFO"))
1.42 paf 236: if(query_string) {
237: char *reconstructed_uri=(char *)malloc(
238: strlen(path_info)+1/*'?'*/+
239: strlen(query_string)+1/*0*/);
240: strcpy(reconstructed_uri, path_info);
241: strcat(reconstructed_uri, "?");
242: strcat(reconstructed_uri, query_string);
243: request_info.uri=reconstructed_uri;
244: } else
245: request_info.uri=path_info;
246: else
247: PTHROW(0, 0,
248: 0,
1.43 paf 249: "CGI: no PATH_INFO defined(in reinventing REQUEST_URI)");
1.68 paf 250:
1.72 paf 251: if(const char *script_name=SAPI::get_env(pool, "SCRIPT_NAME")) {
252: size_t script_name_len=strlen(script_name);
253: size_t uri_len=strlen(request_info.uri);
254: if(strncmp(request_info.uri,script_name, script_name_len)==0 &&
255: script_name_len != uri_len) // under IIS they are the same
256: PTHROW(0, 0,
257: 0,
258: "CGI: illegal call");
259: }
1.68 paf 260: } else
1.42 paf 261: request_info.uri=0;
1.40 paf 262:
1.51 paf 263: request_info.content_type=SAPI::get_env(pool, "CONTENT_TYPE");
264: const char *content_length=SAPI::get_env(pool, "CONTENT_LENGTH");
1.10 paf 265: request_info.content_length=(content_length?atoi(content_length):0);
1.51 paf 266: request_info.cookie=SAPI::get_env(pool, "HTTP_COOKIE");
267: request_info.user_agent=SAPI::get_env(pool, "HTTP_USER_AGENT");
1.10 paf 268:
1.5 paf 269: // prepare to process request
1.38 paf 270: Request request(pool,
1.10 paf 271: request_info,
1.91 parser 272: cgi ? String::UL_USER_HTML : String::UL_AS_IS
1.5 paf 273: );
274:
275: // some root-controlled location
1.3 paf 276: #ifdef WIN32
1.10 paf 277: // c:\windows
1.36 paf 278: static char root_auto_path[MAX_STRING];
1.30 paf 279: GetWindowsDirectory(root_auto_path, MAX_STRING);
1.3 paf 280: #else
1.40 paf 281: // ~nobody todo: figure out a better place
1.64 paf 282: const char *root_auto_path=SAPI::get_env(pool, "HOME");
1.5 paf 283: #endif
284:
285: // beside by binary
1.36 paf 286: static char site_auto_path[MAX_STRING];
1.88 parser 287: strncpy(site_auto_path, argv0, MAX_STRING); // filespec of my binary
288: if(!(
289: rsplit(site_auto_path, '/') ||
1.89 parser 290: rsplit(site_auto_path, '\\'))) { // strip filename
1.88 parser 291: // no path, just filename
292: site_auto_path[0]='.'; site_auto_path[1]=0;
293: }
1.5 paf 294:
295: // process the request
1.35 paf 296: request.core(
1.30 paf 297: root_auto_path, false,
1.31 paf 298: site_auto_path, false,
1.35 paf 299: header_only);
1.57 paf 300:
301: //
302: done_socks();
1.84 parser 303:
304: #ifdef DEBUG_POOL_MALLOC
1.78 parser 305: extern void log_pool_stats(Pool& pool);
306: log_pool_stats(pool);
1.84 parser 307: #endif
1.16 paf 308:
1.22 paf 309: // must be last in PTRY{}PCATCH
1.40 paf 310: #ifdef WIN32
1.5 paf 311: SetUnhandledExceptionFilter(0);
1.25 paf 312: #endif
1.96 parser 313: //
314: if(!cgi)
315: SAPI::send_body(pool, "\n", 1);
316:
1.16 paf 317: // successful finish
318: return 0;
319: } PCATCH(e) { // global problem
1.43 paf 320: // must be first in PCATCH{}
321: #ifdef WIN32
322: SetUnhandledExceptionFilter(0);
323: #endif
1.44 paf 324: // don't allocate anything on pool here:
325: // possible pool' exception not catch-ed now
326: // and there could be out-of-memory exception
1.43 paf 327:
1.19 paf 328: const char *body=e.comment();
1.44 paf 329: // log it
330: SAPI::log(pool, "exception in request exception handler: %s", body);
331:
332: //
1.19 paf 333: int content_length=strlen(body);
1.5 paf 334:
1.35 paf 335: // prepare header
1.37 paf 336: SAPI::add_header_attribute(pool, "content-type", "text/plain");
1.19 paf 337: char content_length_cstr[MAX_NUMBER];
1.60 paf 338: snprintf(content_length_cstr, MAX_NUMBER, "%u", content_length);
1.37 paf 339: SAPI::add_header_attribute(pool, "content-length", content_length_cstr);
1.35 paf 340:
341: // send header
1.37 paf 342: SAPI::send_header(pool);
1.19 paf 343:
344: // body
1.35 paf 345: if(!header_only)
1.37 paf 346: SAPI::send_body(pool, body, content_length);
1.94 parser 347:
1.96 parser 348: //
349: if(!cgi)
350: SAPI::send_body(pool, "\n", 1);
351:
1.16 paf 352: // unsuccessful finish
353: return 1;
354: }
355: PEND_CATCH
1.1 paf 356: }
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