Annotation of parser3/src/main/pa_request.C, revision 1.89
1.54 paf 1: /** @file
1.55 paf 2: Parser: request class main part. @see compile.C and execute.C.
3:
1.9 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.55 paf 5:
1.14 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.9 paf 7:
1.89 ! paf 8: $Id: pa_request.C,v 1.88 2001/03/29 15:00:22 paf Exp $
1.1 paf 9: */
10:
1.70 paf 11: #include "pa_config_includes.h"
1.19 paf 12:
1.69 paf 13: #include "pa_sapi.h"
1.53 paf 14: #include "pa_common.h"
1.1 paf 15: #include "pa_request.h"
1.3 paf 16: #include "pa_wwrapper.h"
17: #include "pa_vclass.h"
1.11 paf 18: #include "_root.h"
1.17 paf 19: #include "_table.h"
1.82 paf 20: #include "_file.h"
1.31 paf 21: #include "pa_globals.h"
1.30 paf 22: #include "pa_vint.h"
23: #include "pa_vmframe.h"
1.32 paf 24: #include "pa_types.h"
1.78 paf 25: #include "pa_vtable.h"
1.89 ! paf 26: #include "_random.h"
1.3 paf 27:
1.72 paf 28: /// $limits.post_max_size default 10M
29: const size_t MAX_POST_SIZE_DEFAULT=10*0x400*400;
30:
1.82 paf 31: /// content type of exception response, when no @MAIN:exception handler defined
32: const char *UNHANDLED_EXCEPTION_CONTENT_TYPE="text/plain";
33:
34: /// content type of response when no $MAIN:defaults.content-type defined
35: const char *DEFAULT_CONTENT_TYPE="text/html";
36:
1.72 paf 37: //
1.28 paf 38: Request::Request(Pool& apool,
1.33 paf 39: Info& ainfo,
1.43 paf 40: String::Untaint_lang adefault_lang) : Pooled(apool),
1.3 paf 41: stack(apool),
1.41 paf 42: ROOT(apool),
43: env(apool),
44: form(apool),
45: request(apool, *this),
46: response(apool),
1.51 paf 47: cookie(apool),
1.3 paf 48: fclasses(apool),
1.43 paf 49: fdefault_lang(adefault_lang), flang(adefault_lang),
50: info(ainfo),
1.85 paf 51: used_files(apool),
1.74 paf 52: default_content_type(0),
1.87 paf 53: mime_types(0)
1.3 paf 54: {
1.27 paf 55: // root superclass,
1.3 paf 56: // parent of all classes,
57: // operators holder
1.41 paf 58: initialize_root_class(pool(), ROOT);
59: classes().put(*root_class_name, &ROOT);
1.27 paf 60: // table class
61: classes().put(*table_class_name, table_class);
1.82 paf 62: // file class
63: classes().put(*file_class_name, file_class);
1.89 ! paf 64: // random class
! 65: classes().put(*random_class_name, random_class);
1.3 paf 66: // env class
1.41 paf 67: classes().put(*env_class_name, &env);
1.27 paf 68: // form class
1.41 paf 69: classes().put(*form_class_name, &form);
1.40 paf 70: // request class
1.41 paf 71: classes().put(*request_class_name, &request);
72: // response class
73: classes().put(*response_class_name, &response);
1.51 paf 74: // cookie class
75: classes().put(*cookie_class_name, &cookie);
1.3 paf 76: }
1.1 paf 77:
1.62 paf 78: static void add_header_attribute(const Hash::Key& aattribute, Hash::Val *ameaning,
79: void *info) {
1.48 paf 80: String *attribute_to_exclude=static_cast<String *>(info);
81: if(aattribute==*attribute_to_exclude)
1.45 paf 82: return;
83:
1.62 paf 84: Value& lmeaning=*static_cast<Value *>(ameaning);
85: Pool& pool=lmeaning.pool();
1.45 paf 86:
1.62 paf 87: String attribute(pool);
1.69 paf 88: SAPI::add_header_attribute(pool,
1.62 paf 89: attribute.append(aattribute, String::UL_HEADER, true).cstr(),
90: attributed_meaning_to_string(lmeaning).cstr());
1.45 paf 91: }
92:
1.64 paf 93: /**
94: load MAIN class, execute @main.
95: MAIN class consists of all the auto.p files we'd manage to find
96: plus
97: the file user requested us to process
98: all located classes become children of one another,
99: composing class we name 'MAIN'
100: */
1.63 paf 101: void Request::core(const char *root_auto_path, bool root_auto_fail,
102: const char *site_auto_path, bool site_auto_fail,
1.62 paf 103: bool header_only) {
1.29 paf 104: VStateless_class *main_class=0;
1.41 paf 105: bool need_rethrow=false; Exception rethrow_me;
1.3 paf 106: TRY {
1.29 paf 107: char *auto_filespec=(char *)malloc(MAX_STRING);
108:
1.63 paf 109: // loading root auto.p
110: if(root_auto_path) {
1.77 paf 111: String& filespec=*NEW String(pool());
1.88 paf 112: filespec.APPEND_CLEAN(root_auto_path, 0, "root_auto", 0);
1.77 paf 113: filespec.APPEND_CONST("/" AUTO_FILE_NAME);
1.29 paf 114: main_class=use_file(
1.77 paf 115: filespec, root_auto_fail,
1.37 paf 116: main_class_name, main_class);
1.29 paf 117: }
118:
1.85 paf 119: // $MAIN:LIMITS hash used here,
1.72 paf 120: // until someone with less privileges have overriden them
1.78 paf 121: {
122: Value *limits=main_class?main_class->get_element(*limits_name):0;
123: // $limits.post_max_size default 10M
124: Value *element=limits?limits->get_element(*post_max_size_name):0;
1.84 paf 125: size_t value=element?(size_t)element->as_double():0;
1.78 paf 126: size_t post_max_size=value?value:MAX_POST_SIZE_DEFAULT;
127:
128: form.fill_fields(*this, post_max_size);
129: }
1.72 paf 130:
1.78 paf 131: // filling cookies
1.72 paf 132: cookie.fill_fields(*this);
133:
1.64 paf 134: // loading site auto.p
1.63 paf 135: if(site_auto_path) {
1.77 paf 136: String& filespec=*NEW String(pool());
1.88 paf 137: filespec.APPEND_CLEAN(site_auto_path, 0, "site_auto", 0);
1.77 paf 138: filespec.APPEND_CONST("/" AUTO_FILE_NAME);
1.37 paf 139: main_class=use_file(
1.77 paf 140: filespec, site_auto_fail,
1.37 paf 141: main_class_name, main_class);
1.29 paf 142: }
1.8 paf 143:
1.72 paf 144: // loading auto.p files from document_root/..
145: // to the one beside requested file.
146: // all assigned bases from upper dir
147: {
148: /* /document/root */
1.77 paf 149: char *file_spec=
1.72 paf 150: (char *)malloc(strlen(info.path_translated)+strlen(AUTO_FILE_NAME)+1);
1.83 paf 151: size_t document_root_size=strlen(info.document_root);
152: if(info.document_root[document_root_size-1]=='/')
153: document_root_size--;
154: memcpy(file_spec, info.document_root, document_root_size);
1.72 paf 155:
156: /* /requested/file.html */
157: char *branches=(char *)malloc(strlen(info.path_translated)+1);
1.83 paf 158: strcpy(branches, info.path_translated+document_root_size);
1.72 paf 159: char *next=branches;
1.83 paf 160: char *append_here=file_spec+document_root_size;
1.72 paf 161:
162: size_t slash_auto_p_size=strlen("/" AUTO_FILE_NAME);
163: while(true) {
164: char *step=lsplit(&next, '/');
165: if(next) { // not 'file.html' part
166: size_t step_size=strlen(step);
167: memcpy(append_here, step, step_size);
168: append_here+=step_size;
169: memcpy(append_here, "/" AUTO_FILE_NAME, slash_auto_p_size+1);
170: append_here++/* / */;
171:
1.77 paf 172: String& sfile_spec=*NEW String(pool());
1.88 paf 173: sfile_spec.APPEND_CLEAN(file_spec, 0, "scanned", 0);
1.77 paf 174: main_class=use_file(sfile_spec, false/*ignore read problem*/,
1.72 paf 175: main_class_name, main_class);
176: } else
177: break;
178: }
179: }
1.34 paf 180:
1.72 paf 181: // compiling requested file
1.77 paf 182: String& spath_translated=*NEW String(pool());
1.88 paf 183: spath_translated.APPEND_CLEAN(info.path_translated, 0, "user-request", 0);
1.77 paf 184: main_class=use_file(spath_translated, true/*don't ignore read problem*/,
1.72 paf 185: main_class_name, main_class);
1.7 paf 186:
1.85 paf 187: // $MAIN:DEFAULTS
1.78 paf 188: Value *defaults=main_class->get_element(*defaults_name);
1.75 paf 189: // value must be allocated on request's pool for that pool used on
190: // meaning constructing @see attributed_meaning_to_string
1.80 paf 191: default_content_type=defaults?defaults->get_element(*content_type_name):0;
1.78 paf 192: if(Value *element=main_class->get_element(*html_typo_name))
1.87 paf 193: if(Table *table=element->get_table())
194: pool().set_tag(table);
1.85 paf 195:
196: // $MAIN:MIME-TYPES
197: if(Value *element=main_class->get_element(*mime_types_name))
198: if(Table *table=element->get_table())
199: mime_types=table;
1.25 paf 200:
201: // execute @main[]
1.41 paf 202: const String *body_string=execute_method(*main_class, *main_method_name);
203: if(!body_string)
1.25 paf 204: THROW(0,0,
205: 0,
206: "'"MAIN_METHOD_NAME"' method not found");
1.79 paf 207:
208: // post-process
209: // todo
1.41 paf 210:
1.45 paf 211: // extract response body
212: Value *body_value=static_cast<Value *>(
213: response.fields().get(*body_name));
214: if(body_value) // there is some $request.body
215: body_string=&body_value->as_string();// TODO: IMAGE&FILE
216:
217: // OK. write out the result
1.62 paf 218: output_result(*body_string, header_only);
1.3 paf 219: }
1.76 paf 220: CATCH(e) { // request handling problem
221: // we're returning not result, but error explanation
1.30 paf 222: TRY {
1.76 paf 223: // log the beast
224: const String *problem_source=e.problem_source();
225: if(problem_source)
226: SAPI::log(pool(),
227: #ifndef NO_STRING_ORIGIN
228: "%s(%d): "
229: #endif
230: "'%s' %s [%s %s]",
231: #ifndef NO_STRING_ORIGIN
232: problem_source->origin().file?problem_source->origin().file:"global",
233: problem_source->origin().line,
234: #endif
235: problem_source->cstr(),
236: e.comment(),
237: e.type()?e.type()->cstr():"-",
238: e.code()?e.code()->cstr():"-"
239: );
240: else
241: SAPI::log(pool(),
242: "%s [%s %s]",
243: e.comment(),
244: e.type()?e.type()->cstr():"-",
245: e.code()?e.code()->cstr():"-"
246: );
1.43 paf 247:
248: // reset language to default
249: flang=fdefault_lang;
250:
251: // reset response
252: response.fields().clear();
253:
254: // this is what we'd return in $response:body
1.41 paf 255: const String *body_string=0;
1.43 paf 256:
1.30 paf 257: if(main_class) { // we've managed to end up with some main_class
258: // maybe we'd be lucky enough as to report an error
259: // in a gracefull way...
260: if(Value *value=main_class->get_element(*exception_method_name))
261: if(Junction *junction=value->get_junction())
262: if(const Method *method=junction->method) {
263: // preparing to pass parameters to
264: // @exception[origin;source;comment;type;code]
1.38 paf 265: VMethodFrame frame(pool(), *junction);
266: frame.set_self(*main_class);
1.30 paf 267:
268: const String *problem_source=e.problem_source();
269: // origin
1.44 paf 270: String origin_name(pool(), "origin");
1.38 paf 271: Value *origin_value=0;
1.30 paf 272: #ifndef NO_STRING_ORIGIN
1.38 paf 273: if(problem_source) {
274: const Origin& origin=problem_source->origin();
275: if(origin.file) {
276: char *buf=(char *)malloc(MAX_STRING);
1.42 paf 277: snprintf(buf, MAX_STRING, "%s(%d):",
1.38 paf 278: origin.file, 1+origin.line);
1.44 paf 279: String *origin_file_line=NEW String(pool(),
280: buf, true);
1.38 paf 281: origin_value=NEW VString(*origin_file_line);
282: }
1.30 paf 283: }
284: #endif
1.38 paf 285: frame.store_param(origin_name,
286: origin_value?origin_value:NEW VUnknown(pool()));
1.28 paf 287:
1.30 paf 288: // source
1.44 paf 289: String source_name(pool(), "source");
1.38 paf 290: Value *source_value=0;
1.43 paf 291: if(problem_source) {
1.47 paf 292: String& problem_source_copy=*NEW String(pool());
293: problem_source_copy.append(*problem_source,
294: flang, true);
1.43 paf 295: source_value=NEW VString(problem_source_copy);
296: }
1.38 paf 297: frame.store_param(source_name,
298: source_value?source_value:NEW VUnknown(pool()));
1.30 paf 299:
300: // comment
1.44 paf 301: String comment_name(pool(), "comment");
302: String *comment_value=NEW String(pool(),
303: e.comment(), true);
1.38 paf 304: frame.store_param(comment_name,
1.30 paf 305: NEW VString(*comment_value));
306:
307: // type
1.44 paf 308: String type_name(pool(), "type");
1.30 paf 309: Value *type_value;
1.43 paf 310: if(e.type()) {
1.47 paf 311: String& type_copy=*NEW String(pool());
312: type_value=NEW VString(type_copy.append(*e.type(),
313: flang, true));
1.43 paf 314: } else
1.30 paf 315: type_value=NEW VUnknown(pool());
1.38 paf 316: frame.store_param(type_name, type_value);
1.30 paf 317:
318: // code
1.44 paf 319: String code_name(pool(), "code");
1.30 paf 320: Value *code_value;
1.43 paf 321: if(e.code()) {
1.47 paf 322: String& code_copy=*NEW String(pool());
323: code_value=NEW VString(code_copy.append(*e.code(),
324: flang, true));
1.43 paf 325: } else
1.30 paf 326: code_value=NEW VUnknown(pool());
1.38 paf 327: frame.store_param(code_name, code_value);
1.30 paf 328:
1.43 paf 329: // future $response:body=
330: // execute ^exception[origin;source;comment;type;code]
331: body_string=execute_method(frame, *method);
1.30 paf 332: }
333: }
334:
1.41 paf 335: if(!body_string) { // couldn't report an error beautifully?
336: // doing that ugly
337:
338: // make up result: $origin $source $comment $type $code
339: char *buf=(char *)malloc(MAX_STRING);
1.30 paf 340: size_t printed=0;
341: const String *problem_source=e.problem_source();
342: if(problem_source) {
1.16 paf 343: #ifndef NO_STRING_ORIGIN
1.30 paf 344: const Origin& origin=problem_source->origin();
345: if(origin.file)
1.41 paf 346: printed+=snprintf(buf+printed, MAX_STRING-printed, "%s(%d): ",
1.30 paf 347: origin.file, 1+origin.line);
1.28 paf 348: #endif
1.41 paf 349: printed+=snprintf(buf+printed, MAX_STRING-printed, "'%s' ",
1.30 paf 350: problem_source->cstr());
351: }
1.41 paf 352: printed+=snprintf(buf+printed, MAX_STRING-printed, "%s",
1.30 paf 353: e.comment());
354: const String *type=e.type();
355: if(type) {
1.41 paf 356: printed+=snprintf(buf+printed, MAX_STRING-printed, " type: %s",
1.30 paf 357: type->cstr());
358: const String *code=e.code();
359: if(code)
1.41 paf 360: printed+=snprintf(buf+printed, MAX_STRING-printed, ", code: %s",
1.30 paf 361: code->cstr());
362: }
1.43 paf 363:
364: // future $response:content-type
1.49 paf 365: response.fields().put(*content_type_name,
1.82 paf 366: NEW VString(*NEW String(pool(), UNHANDLED_EXCEPTION_CONTENT_TYPE)));
1.43 paf 367: // future $response:body
1.44 paf 368: body_string=NEW String(pool(), buf);
1.30 paf 369: }
1.41 paf 370:
1.45 paf 371: // ERROR. write it out
1.62 paf 372: output_result(*body_string, header_only);
1.3 paf 373: }
1.30 paf 374: CATCH(e) {
1.41 paf 375: // exception in request exception handler
376: // remember to rethrow it
377: rethrow_me=e; need_rethrow=true;
1.1 paf 378: }
1.30 paf 379: END_CATCH
1.1 paf 380: }
1.41 paf 381: END_CATCH // do not use pool() after this point - no exception handler set
382: // any throw() would try to use zero exception() pointer
383:
384: if(need_rethrow) // there were an exception set for us to rethrow?
1.62 paf 385: THROW(rethrow_me.type(), rethrow_me.code(),
1.41 paf 386: rethrow_me.problem_source(),
387: rethrow_me.comment());
1.28 paf 388:
1.1 paf 389: }
390:
1.77 paf 391: VStateless_class *Request::use_file(const String& file_spec, bool fail_on_read_problem,
1.26 paf 392: const String *name,
393: VStateless_class *base_class) {
1.73 paf 394: // cyclic dependence check
1.77 paf 395: if(used_files.get(file_spec))
1.73 paf 396: return base_class;
1.77 paf 397: used_files.put(file_spec, (Hash::Val *)true);
1.73 paf 398:
399:
1.77 paf 400: char *source=file_read_text(pool(), file_spec, fail_on_read_problem);
1.3 paf 401: if(!source)
1.12 paf 402: return base_class;
1.3 paf 403:
1.77 paf 404: return use_buf(source, file_spec.cstr(), 0/*new class*/, name, base_class);
1.16 paf 405: }
406:
1.67 paf 407: VStateless_class *Request::use_buf(const char *source, const char *file,
1.26 paf 408: VStateless_class *aclass, const String *name,
409: VStateless_class *base_class) {
1.5 paf 410: // compile loaded class
1.26 paf 411: VStateless_class& cclass=COMPILE(source, aclass, name, base_class, file);
1.1 paf 412:
1.4 paf 413: // locate and execute possible @auto[] static method
1.25 paf 414: execute_method(cclass, *auto_method_name, false /*no result needed*/);
1.16 paf 415: return &cclass;
1.20 paf 416: }
417:
1.52 paf 418: /**
419: - fail_if_junction(true, junction = fail
420: - fail_if_junction(false, not junction = fail
421: */
1.62 paf 422: void Request::fail_if_junction_(bool is, Value& value,
423: const String& method_name, const char *msg) {
1.20 paf 424:
425: if((value.get_junction()!=0) ^ !is)
426: THROW(0, 0,
427: &method_name,
428: msg);
1.19 paf 429: }
430:
1.77 paf 431: const String& Request::relative(const char *apath, const String& relative_name) {
432: int lpath_buf_size=strlen(apath)+1;
433: char *lpath=(char *)malloc(lpath_buf_size);
434: memcpy(lpath, apath, lpath_buf_size);
435: rsplit(lpath, '/');
436: String& result=*NEW String(pool(), lpath);
437: result.APPEND_CONST("/");
438: result.append(relative_name, String::UL_PASS_APPENDED);
1.19 paf 439: return result;
440: }
441:
1.77 paf 442: const String& Request::absolute(const String& relative_name) {
443: char *relative_name_cstr=relative_name.cstr();
444: if(relative_name_cstr[0]=='/') {
445: String& result=*NEW String(pool(), info.document_root);
446: result.append(relative_name, String::UL_PASS_APPENDED);
1.19 paf 447: return result;
448: } else
1.77 paf 449: return relative(info.path_translated, relative_name);
1.1 paf 450: }
1.45 paf 451:
1.62 paf 452: void Request::output_result(const String& body_string, bool header_only) {
1.51 paf 453: // header: cookies
454: cookie.output_result();
455:
1.49 paf 456: // set default content-type
1.80 paf 457: response.fields().put_dont_replace(*content_type_name,
458: default_content_type?default_content_type
1.82 paf 459: :NEW VString(*NEW String(pool(), DEFAULT_CONTENT_TYPE)));
1.49 paf 460:
1.62 paf 461: // prepare header: $response:fields without :body
1.73 paf 462: response.fields().for_each(add_header_attribute, /*excluding*/ body_name);
1.50 paf 463:
1.62 paf 464: // prepare...
1.45 paf 465: const char *body=body_string.cstr();
1.50 paf 466: size_t content_length=strlen(body);
467:
1.62 paf 468: // prepare header: content-length
1.65 paf 469: if(content_length) { // useful for redirecting [header "location: http://..."]
470: char content_length_cstr[MAX_NUMBER];
1.66 paf 471: snprintf(content_length_cstr, MAX_NUMBER, "%lu", content_length);
1.69 paf 472: SAPI::add_header_attribute(pool(), "content-length", content_length_cstr);
1.65 paf 473: }
1.62 paf 474:
475: // send header
1.69 paf 476: SAPI::send_header(pool());
1.71 paf 477:
1.62 paf 478: // send body
479: if(!header_only)
1.69 paf 480: SAPI::send_body(pool(), body, content_length);
1.50 paf 481: }
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