Annotation of parser3/src/targets/cgi/parser3.C, revision 1.91
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:
1.91 ! parser 8: $Id: parser3.C,v 1.90 2001/05/24 09:29:52 parser 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:
1.37 paf 17: #include "pa_sapi.h"
1.76 paf 18: #include "classes.h"
1.24 paf 19: #include "pa_common.h"
1.2 paf 20: #include "pa_request.h"
1.57 paf 21: #include "pa_socks.h"
1.68 paf 22: #include "pa_version.h"
1.69 paf 23:
1.84 parser 24: //#define DEBUG_POOL_MALLOC
25:
26:
1.42 paf 27: /// IIS refuses to read bigger chunks
28: const size_t READ_POST_CHUNK_SIZE=0x400*0x400; // 1M
29:
1.45 paf 30: const char *argv0;
1.42 paf 31: Pool pool(0); // global pool [dont describe to doxygen: it confuses it with param names]
1.27 paf 32: bool cgi; ///< we were started as CGI?
1.5 paf 33:
1.40 paf 34: #ifdef WIN32
35: /// global system errors into parser exceptions converter
1.43 paf 36: static LONG WINAPI TopLevelExceptionFilter(struct _EXCEPTION_POINTERS *ExceptionInfo) {
1.5 paf 37: char buf[MAX_STRING];
38: if(ExceptionInfo && ExceptionInfo->ExceptionRecord) {
1.36 paf 39: struct _EXCEPTION_RECORD *er=ExceptionInfo->ExceptionRecord;
1.46 paf 40: snprintf(buf, MAX_STRING, "Exception 0x%X at %p",
1.31 paf 41: er->ExceptionCode,
42: er->ExceptionAddress);
1.5 paf 43: } else
44: strcpy(buf, "Exception <unknown>");
45:
46: PTHROW(0, 0,
47: 0,
48: buf);
49:
50: return EXCEPTION_EXECUTE_HANDLER; // never reached
51: }
1.27 paf 52: #endif
53:
1.46 paf 54: // SAPI
1.86 parser 55:
56: // appends to parser3.log located beside my binary if openable, to stderr otherwize
1.61 paf 57: void SAPI::log(Pool& pool, const char *fmt, ...) {
58: bool opened;
59: FILE *f=0;
60:
61: if(argv0) {
62: // beside by binary
63: char file_spec[MAX_STRING];
64: strncpy(file_spec, argv0, MAX_STRING); // filespec of my binary
65: rsplit(file_spec, '/'); rsplit(file_spec, '\\');// strip filename
66: strcat(file_spec, "/parser3.log");
67: f=fopen(file_spec, "at");
68: }
69: opened=f!=0;
70: if(!opened)
71: f=stderr;
72:
73: // prefix
74: time_t t=time(0);
75: const char *stamp=ctime(&t);
76: fprintf(f, "[%.*s] ", strlen(stamp)-1, stamp);
77: // message
78: va_list args;
79: va_start(args,fmt);
80: vfprintf(f, fmt, args);
81: va_end(args);
82: // newline
83: fprintf(f, "\n");
84:
85: if(opened)
86: fclose(f);
1.85 parser 87: else
88: fflush(f);
1.61 paf 89: }
90:
1.37 paf 91: const char *SAPI::get_env(Pool& pool, const char *name) {
1.28 paf 92: return getenv(name);
93: }
94:
1.59 paf 95: size_t SAPI::read_post(Pool& pool, char *buf, size_t max_bytes) {
96: size_t read_size=0;
1.12 paf 97: do {
1.36 paf 98: int chunk_size=read(fileno(stdin),
1.42 paf 99: buf+read_size, min(READ_POST_CHUNK_SIZE, max_bytes-read_size));
1.12 paf 100: if(chunk_size<0)
101: break;
102: read_size+=chunk_size;
103: } while(read_size<max_bytes);
104:
105: return read_size;
1.10 paf 106: }
107:
1.37 paf 108: void SAPI::add_header_attribute(Pool& pool, const char *key, const char *value) {
1.68 paf 109: if(cgi)
1.20 paf 110: printf("%s: %s\n", key, value);
1.19 paf 111: }
112:
1.56 paf 113: /// @todo intelligent cache-control
1.37 paf 114: void SAPI::send_header(Pool& pool) {
1.33 paf 115: if(cgi) {
1.55 paf 116: puts("expires: Fri, 23 Mar 2001 09:32:23 GMT");
1.33 paf 117:
118: // header | body delimiter
1.20 paf 119: puts("");
1.33 paf 120: }
1.30 paf 121: }
1.20 paf 122:
1.53 paf 123: void SAPI::send_body(Pool& pool, const void *buf, size_t size) {
1.19 paf 124: stdout_write(buf, size);
1.58 paf 125: }
126:
1.40 paf 127: /**
128: main workhorse
1.19 paf 129:
1.56 paf 130: @todo
1.40 paf 131: IIS: remove trailing default-document[index.html] from $request.uri.
132: to do that we need to consult metabase,
133: wich is tested but seems slow.
134: */
1.5 paf 135: int main(int argc, char *argv[]) {
1.45 paf 136: argv0=argv[0];
137:
1.32 paf 138: umask(2);
139:
140: #ifdef WIN32
1.27 paf 141: setmode(fileno(stdin), _O_BINARY);
142: setmode(fileno(stdout), _O_BINARY);
143: setmode(fileno(stderr), _O_BINARY);
1.32 paf 144: #endif
1.12 paf 145:
1.3 paf 146: // were we started as CGI?
1.20 paf 147: cgi=
1.2 paf 148: getenv("SERVER_SOFTWARE") ||
149: getenv("SERVER_NAME") ||
150: getenv("GATEWAY_INTERFACE") ||
151: getenv("REQUEST_METHOD");
1.5 paf 152:
1.10 paf 153: if(!cgi) {
154: if(argc<2) {
1.69 paf 155: printf(
156: "Parser/%s Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com)\n"
157: "Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)\n"
158: "\n"
159: "Usage: %s <file>\n",
160: PARSER_VERSION,
161: argv0?argv0:"parser3");
1.67 paf 162: return 1;
1.10 paf 163: }
164: }
165:
1.26 paf 166: char *filespec_to_process=cgi?getenv("PATH_TRANSLATED"):argv[1];
1.36 paf 167: #ifdef WIN32
1.43 paf 168: back_slashes_to_slashes(filespec_to_process);
1.36 paf 169: #endif
1.10 paf 170:
1.35 paf 171: const char *request_method=getenv("REQUEST_METHOD");
172: bool header_only=request_method && strcasecmp(request_method, "HEAD")==0;
1.5 paf 173: PTRY { // global try
174: // must be first in PTRY{}PCATCH
1.40 paf 175: #ifdef WIN32
1.5 paf 176: SetUnhandledExceptionFilter(&TopLevelExceptionFilter);
177: #endif
1.2 paf 178:
1.62 paf 179: // init socks
1.57 paf 180: init_socks(pool);
181:
1.73 paf 182: // init global classes
183: init_methoded_array(pool);
1.10 paf 184: // init global variables
1.37 paf 185: pa_globals_init(pool);
1.10 paf 186:
1.13 paf 187: if(!filespec_to_process)
188: PTHROW(0, 0,
189: 0,
1.68 paf 190: "Parser/%s", PARSER_VERSION);
1.13 paf 191:
1.10 paf 192: // Request info
193: Request::Info request_info;
1.39 paf 194: if(cgi) {
1.51 paf 195: if(const char *env_document_root=SAPI::get_env(pool, "DOCUMENT_ROOT"))
1.39 paf 196: request_info.document_root=env_document_root;
1.51 paf 197: else if(const char *path_info=SAPI::get_env(pool, "PATH_INFO")) {
1.40 paf 198: // IIS
1.39 paf 199: size_t len=strlen(filespec_to_process)-strlen(path_info);
1.40 paf 200: char *buf=(char *)pool.malloc(len+1);
201: strncpy(buf, filespec_to_process, len);
1.39 paf 202: buf[len]=0;
203: request_info.document_root=buf;
204: } else
205: PTHROW(0, 0,
206: 0,
1.43 paf 207: "CGI: no PATH_INFO defined(in reinventing DOCUMENT_ROOT)");
1.39 paf 208: } else {
209: static char buf[MAX_STRING];
210: strncpy(buf, filespec_to_process, MAX_STRING);
1.70 paf 211: if(rsplit(buf, '/') || rsplit(buf, '\\')) // strip filename
212: request_info.document_root=buf;
213: else
214: request_info.document_root="";
1.13 paf 215: }
1.10 paf 216: request_info.path_translated=filespec_to_process;
1.35 paf 217: request_info.method=request_method;
1.51 paf 218: const char *query_string=SAPI::get_env(pool, "QUERY_STRING");
1.40 paf 219: request_info.query_string=query_string;
1.68 paf 220: if(cgi) {
1.51 paf 221: if(const char *env_request_uri=SAPI::get_env(pool, "REQUEST_URI"))
1.42 paf 222: request_info.uri=env_request_uri;
1.51 paf 223: else if(const char *path_info=SAPI::get_env(pool, "PATH_INFO"))
1.42 paf 224: if(query_string) {
225: char *reconstructed_uri=(char *)malloc(
226: strlen(path_info)+1/*'?'*/+
227: strlen(query_string)+1/*0*/);
228: strcpy(reconstructed_uri, path_info);
229: strcat(reconstructed_uri, "?");
230: strcat(reconstructed_uri, query_string);
231: request_info.uri=reconstructed_uri;
232: } else
233: request_info.uri=path_info;
234: else
235: PTHROW(0, 0,
236: 0,
1.43 paf 237: "CGI: no PATH_INFO defined(in reinventing REQUEST_URI)");
1.68 paf 238:
1.72 paf 239: if(const char *script_name=SAPI::get_env(pool, "SCRIPT_NAME")) {
240: size_t script_name_len=strlen(script_name);
241: size_t uri_len=strlen(request_info.uri);
242: if(strncmp(request_info.uri,script_name, script_name_len)==0 &&
243: script_name_len != uri_len) // under IIS they are the same
244: PTHROW(0, 0,
245: 0,
246: "CGI: illegal call");
247: }
1.68 paf 248: } else
1.42 paf 249: request_info.uri=0;
1.40 paf 250:
1.51 paf 251: request_info.content_type=SAPI::get_env(pool, "CONTENT_TYPE");
252: const char *content_length=SAPI::get_env(pool, "CONTENT_LENGTH");
1.10 paf 253: request_info.content_length=(content_length?atoi(content_length):0);
1.51 paf 254: request_info.cookie=SAPI::get_env(pool, "HTTP_COOKIE");
255: request_info.user_agent=SAPI::get_env(pool, "HTTP_USER_AGENT");
1.10 paf 256:
1.5 paf 257: // prepare to process request
1.38 paf 258: Request request(pool,
1.10 paf 259: request_info,
1.91 ! parser 260: cgi ? String::UL_USER_HTML : String::UL_AS_IS
1.5 paf 261: );
262:
263: // some root-controlled location
1.3 paf 264: #ifdef WIN32
1.10 paf 265: // c:\windows
1.36 paf 266: static char root_auto_path[MAX_STRING];
1.30 paf 267: GetWindowsDirectory(root_auto_path, MAX_STRING);
1.3 paf 268: #else
1.40 paf 269: // ~nobody todo: figure out a better place
1.64 paf 270: const char *root_auto_path=SAPI::get_env(pool, "HOME");
1.5 paf 271: #endif
272:
273: // beside by binary
1.36 paf 274: static char site_auto_path[MAX_STRING];
1.88 parser 275: strncpy(site_auto_path, argv0, MAX_STRING); // filespec of my binary
276: if(!(
277: rsplit(site_auto_path, '/') ||
1.89 parser 278: rsplit(site_auto_path, '\\'))) { // strip filename
1.88 parser 279: // no path, just filename
280: site_auto_path[0]='.'; site_auto_path[1]=0;
281: }
1.5 paf 282:
283: // process the request
1.35 paf 284: request.core(
1.30 paf 285: root_auto_path, false,
1.31 paf 286: site_auto_path, false,
1.35 paf 287: header_only);
1.57 paf 288:
289: //
290: done_socks();
1.84 parser 291:
292: #ifdef DEBUG_POOL_MALLOC
1.78 parser 293: extern void log_pool_stats(Pool& pool);
294: log_pool_stats(pool);
1.84 parser 295: #endif
1.16 paf 296:
1.22 paf 297: // must be last in PTRY{}PCATCH
1.40 paf 298: #ifdef WIN32
1.5 paf 299: SetUnhandledExceptionFilter(0);
1.25 paf 300: #endif
1.16 paf 301: // successful finish
302: return 0;
303: } PCATCH(e) { // global problem
1.43 paf 304: // must be first in PCATCH{}
305: #ifdef WIN32
306: SetUnhandledExceptionFilter(0);
307: #endif
1.44 paf 308: // don't allocate anything on pool here:
309: // possible pool' exception not catch-ed now
310: // and there could be out-of-memory exception
1.43 paf 311:
1.19 paf 312: const char *body=e.comment();
1.44 paf 313: // log it
314: SAPI::log(pool, "exception in request exception handler: %s", body);
315:
316: //
1.19 paf 317: int content_length=strlen(body);
1.5 paf 318:
1.35 paf 319: // prepare header
1.37 paf 320: SAPI::add_header_attribute(pool, "content-type", "text/plain");
1.19 paf 321: char content_length_cstr[MAX_NUMBER];
1.60 paf 322: snprintf(content_length_cstr, MAX_NUMBER, "%u", content_length);
1.37 paf 323: SAPI::add_header_attribute(pool, "content-length", content_length_cstr);
1.35 paf 324:
325: // send header
1.37 paf 326: SAPI::send_header(pool);
1.19 paf 327:
328: // body
1.35 paf 329: if(!header_only)
1.37 paf 330: SAPI::send_body(pool, body, content_length);
1.2 paf 331:
1.16 paf 332: // unsuccessful finish
333: return 1;
334: }
335: PEND_CATCH
1.1 paf 336: }
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