Annotation of parser3/src/include/pa_request.h, revision 1.177.6.1
1.61 paf 1: /** @file
1.62 paf 2: Parser: request class decl.
3:
1.177.6.1! paf 4: Copyright (c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com)
1.121 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6: */
7:
8: #ifndef PA_REQUEST_H
9: #define PA_REQUEST_H
1.141 paf 10:
1.177.6.1! paf 11: static const char * const IDENT_REQUEST_H="$Date: 2004/10/05 11:07:48 $";
1.1 paf 12:
1.168 paf 13: #include "pa_pool.h"
1.5 paf 14: #include "pa_hash.h"
1.7 paf 15: #include "pa_wcontext.h"
1.6 paf 16: #include "pa_value.h"
1.7 paf 17: #include "pa_stack.h"
1.162 paf 18: #include "pa_request_info.h"
19: #include "pa_request_charsets.h"
20: #include "pa_sapi.h"
1.44 paf 21:
1.112 paf 22: #ifdef RESOURCES_DEBUG
23: #include <sys/resource.h>
24: #endif
25:
1.128 paf 26: // consts
27:
1.161 paf 28: const uint ANTI_ENDLESS_EXECUTE_RECOURSION=1000;
1.162 paf 29: const size_t pseudo_file_no__process=1;
1.128 paf 30:
1.162 paf 31: // forwards
1.4 paf 32:
1.39 paf 33: class Temp_lang;
1.84 paf 34: class Methoded;
1.116 paf 35: class VMethodFrame;
1.162 paf 36: class GdomeDOMString_auto_ptr;
37: class VMail;
38: class VForm;
39: class VResponse;
40: class VCookie;
41: class VStateless_class;
1.1 paf 42:
1.61 paf 43: /// Main workhorse.
1.162 paf 44: class Request: public PA_Object {
1.107 paf 45: friend class Temp_lang;
1.117 paf 46: friend class Temp_connection;
1.148 paf 47: friend class Request_context_saver;
1.155 paf 48: friend class Temp_request_self;
1.162 paf 49: friend class Exception_trace;
50:
1.1 paf 51: public:
1.162 paf 52: class Trace {
53: const String* fname;
54: Operation::Origin forigin;
55: public:
56: Trace(): fname(0) {}
57: void clear() { fname=0; }
58: operator bool() const { return fname!=0; }
59:
60: Trace(const String* aname, const Operation::Origin aorigin):
61: fname(aname), forigin(aorigin) {}
62:
63: const String* name() const { return fname; }
64: const Operation::Origin origin() const { return forigin; }
65: };
66:
1.168 paf 67: private:
68: Pool fpool;
69: public:
70: Pool& pool() { return fpool; }
1.162 paf 71:
72: private:
73: union StackItem {
74: Value* fvalue;
75: ArrayOperation* fops;
76: VMethodFrame* fmethod_frame;
77: public:
78: Value& value() const { return *fvalue; }
79: const String& string() const {
1.167 paf 80: return fvalue->as_string();
1.162 paf 81: }
82: ArrayOperation& ops() const { return *fops; }
83: VMethodFrame& method_frame() const { return *fmethod_frame; }
84:
85: /// needed to fill unused Array entries
86: StackItem() {}
87: StackItem(Value& avalue): fvalue(&avalue) {}
88: StackItem(ArrayOperation& aops): fops(&aops) {}
89: StackItem(VMethodFrame& amethod_frame): fmethod_frame(&amethod_frame) {}
90: };
91:
92: class Exception_trace: public Stack<Trace> {
93: size_t fbottom;
94: public:
95: Exception_trace(): fbottom(0) {}
96:
97: size_t bottom_index() { return fbottom; }
1.165 paf 98: void set_bottom_index(size_t abottom) { fbottom=abottom; }
1.162 paf 99: element_type bottom_value() { return get(bottom_index()); }
100:
101: void clear() {
102: ftop=fbottom=0;
103: }
104:
105: bool is_empty() {
106: return ftop==fbottom;
107: }
108:
109: const element_type extract_origin(const String*& problem_source);
110: };
111:
112: ///@{ core data
113:
114: /// classes
115: HashStringValue fclasses;
116:
117: /// already used files to avoid cyclic uses
1.163 paf 118: Hash<const String::Body, bool> used_files;
1.162 paf 119: /// list of all used files, Operation::file_no = index to it
1.163 paf 120: Array<String::Body> file_list;
1.162 paf 121:
122: /** endless execute(execute(... preventing counter
123: @see ANTI_ENDLESS_EXECUTE_RECOURSION
124: */
125: uint anti_endless_execute_recoursion;
126:
127: ///@}
128:
129: /// execution stack
130: Stack<StackItem> stack;
131:
132: /// exception stack trace
133: Exception_trace exception_trace;
134: public:
135:
136: //@{ request processing status
137: /// contexts
138: VMethodFrame* method_frame;
139: Value* rcontext;
140: WContext* wcontext;
141: /// current language
142: String::Language flang;
143: /// current connection
144: SQL_Connection* fconnection;
145: //@}
146: /// interrupted flag, raised on signals [SIGPIPE]
147: bool finterrupted;
148:
149: public:
1.175 paf 150: uint register_file(String::Body file_spec);
1.162 paf 151:
152: struct Exception_details {
153: const Trace trace;
154: const String* problem_source;
155: VHash& vhash;
156:
157: Exception_details(
158: const Trace atrace,
159: const String* aproblem_source,
1.166 paf 160: VHash& avhash): trace(atrace), problem_source(aproblem_source), vhash(avhash) {}
1.162 paf 161: };
162: Exception_details get_details(const Exception& e);
1.176 paf 163: const char* get_exception_cstr(const Exception& e, Exception_details& details);
1.162 paf 164:
165: /// @see Stack::wipe_unused
166: void wipe_unused_execution_stack() {
167: stack.wipe_unused();
168: }
1.112 paf 169:
170: #ifdef RESOURCES_DEBUG
171: /// measures
172: double sql_connect_time;
173: double sql_request_time;
174: #endif
1.61 paf 175:
1.162 paf 176: Request(SAPI_Info& asapi_info, Request_info& arequest_info,
177: String::Language adefault_lang, ///< all tainted data default untainting lang
1.110 paf 178: bool status_allowed ///< status class allowed
1.50 paf 179: );
1.118 paf 180: ~Request();
1.1 paf 181:
1.61 paf 182: /// global classes
1.162 paf 183: HashStringValue& classes() { return fclasses; }
1.6 paf 184:
1.65 paf 185: /**
186: core request processing
187:
188: BEWARE: may throw exception to you: catch it!
189: */
190: void core(
1.162 paf 191: const char* config_filespec, ///< system config filespec
1.138 paf 192: bool config_fail_on_read_problem, ///< fail if system config file not found
1.65 paf 193: bool header_only);
1.17 paf 194:
1.61 paf 195: /// executes ops
1.162 paf 196: void execute(ArrayOperation& ops); // execute.C
1.127 paf 197: /// execute ops with anti-recoursion check
1.162 paf 198: void recoursion_checked_execute(/*const String& name, */ArrayOperation& ops) {
1.128 paf 199: // anti_endless_execute_recoursion
200: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
201: anti_endless_execute_recoursion=0; // give @exception a chance
202: throw Exception("parser.runtime",
1.162 paf 203: 0, //&name,
1.128 paf 204: "call canceled - endless recursion detected");
205: }
1.147 paf 206: execute(ops); // execute it
1.128 paf 207: anti_endless_execute_recoursion--;
208: }
1.40 paf 209:
1.64 paf 210: /// compiles the file, maybe forcing it's class @a name and @a base_class.
1.162 paf 211: void use_file(VStateless_class& aclass,
1.94 parser 212: const String& file_name,
1.162 paf 213: const String* main_alias=0,
1.149 paf 214: bool ignore_class_path=false,
1.162 paf 215: bool fail_on_read_problem=true,
216: bool fail_on_file_absence=true); // pa_request.C
1.64 paf 217: /// compiles a @a source buffer
1.162 paf 218: void use_buf(VStateless_class& aclass,
219: const char* source,
220: const String* main_alias,
1.175 paf 221: uint file_no,
222: int line_no_offset=0); // pa_request.C
1.28 paf 223:
1.129 paf 224: /// processes any code-junction there may be inside of @a value
1.131 paf 225: StringOrValue process(Value& input_value, bool intercept_string=true); // execute.C
1.129 paf 226: //@{ convinient helpers
227: const String& process_to_string(Value& input_value) {
228: return process(input_value, true/*intercept_string*/).as_string();
229: }
230: Value& process_to_value(Value& input_value, bool intercept_string=true) {
231: return process(input_value, intercept_string).as_value();
1.126 paf 232: }
233: //@}
1.131 paf 234:
1.126 paf 235:
1.131 paf 236: #define DEFINE_DUAL(modification) \
237: void write_##modification##_lang(StringOrValue dual) { \
1.162 paf 238: if(const String* string=dual.get_string()) \
1.131 paf 239: write_##modification##_lang(*string); \
240: else \
241: write_##modification##_lang(*dual.get_value()); \
242: }
243:
1.61 paf 244: /// appending, sure of clean string inside
1.65 paf 245: void write_no_lang(const String& astring) {
1.111 paf 246: wcontext->write(astring,
1.162 paf 247: (String::Language)(String::L_CLEAN | flang&String::L_OPTIMIZE_BIT));
1.49 paf 248: }
1.131 paf 249: /// appending sure value, that would be converted to clean string
250: void write_no_lang(Value& avalue) {
251: if(wcontext->get_in_expression())
252: wcontext->write(avalue);
253: else
254: wcontext->write(avalue,
1.162 paf 255: (String::Language)(String::L_CLEAN | flang&String::L_OPTIMIZE_BIT));
1.131 paf 256: }
257:
1.61 paf 258: /// appending string, passing language built into string being written
1.65 paf 259: void write_pass_lang(const String& astring) {
1.162 paf 260: wcontext->write(astring, String::L_PASS_APPENDED);
1.59 paf 261: }
1.131 paf 262: /// appending possible string, passing language built into string being written
263: void write_pass_lang(Value& avalue) {
1.162 paf 264: wcontext->write(avalue, String::L_PASS_APPENDED);
1.131 paf 265: }
266: DEFINE_DUAL(pass)
267:
1.61 paf 268: /// appending possible string, assigning untaint language
1.40 paf 269: void write_assign_lang(Value& avalue) {
1.39 paf 270: wcontext->write(avalue, flang);
1.106 parser 271: }
272: /// appending string, assigning untaint language
273: void write_assign_lang(const String& astring) {
274: wcontext->write(astring, flang);
1.22 paf 275: }
1.131 paf 276: DEFINE_DUAL(assign)
1.22 paf 277:
1.64 paf 278: /// returns relative to @a path path to @a file
1.162 paf 279: const String& relative(const char* apath, const String& relative_name);
1.61 paf 280:
1.64 paf 281: /// returns an absolute @a path to relative @a name
1.69 paf 282: const String& absolute(const String& relative_name);
1.42 paf 283:
1.80 paf 284: /// returns the mime type of 'user_file_name_cstr'
1.162 paf 285: const String& mime_type_of(const char* user_file_name_cstr);
1.80 paf 286:
1.117 paf 287: /// returns current SQL connection if any
1.162 paf 288: SQL_Connection* connection(bool fail_on_error=true) {
289: if(fail_on_error && !fconnection)
1.125 paf 290: throw Exception("parser.runtime",
1.162 paf 291: 0,
1.117 paf 292: "outside of 'connect' operator");
293:
294: return fconnection;
1.133 paf 295: }
296:
1.162 paf 297: void set_interrupted(bool ainterrupted) { finterrupted=ainterrupted; }
298: bool get_interrupted() { return finterrupted; }
1.158 paf 299:
1.17 paf 300: public:
1.22 paf 301:
1.61 paf 302: /// info from web server
1.162 paf 303: Request_info& request_info;
304:
305: /// info about ServerAPI
306: SAPI_Info& sapi_info;
307:
308: /// source, client, mail charsets
309: Request_charsets charsets;
1.53 paf 310:
1.154 paf 311: /// 'MAIN' class conglomerat & operators are methods of this class
1.162 paf 312: VStateless_class& main_class;
1.86 paf 313: /// $form:elements
1.162 paf 314: VForm& form;
1.140 paf 315: /// $mail
1.162 paf 316: VMail& mail;
1.86 paf 317: /// $response:elements
1.162 paf 318: VResponse& response;
1.86 paf 319: /// $cookie:elements
1.162 paf 320: VCookie& cookie;
1.70 paf 321:
1.148 paf 322: /// classes configured data
1.169 paf 323: Hash<const String::Body, void*> classes_conf;
1.85 paf 324:
1.148 paf 325: public: // status read methods
1.76 paf 326:
1.148 paf 327: VMethodFrame *get_method_frame() { return method_frame; }
1.162 paf 328: Value& get_self();
329: #define GET_SELF(request, type) (static_cast<type &>(request.get_self()))
330: /* for strange reason call to this:
331: r.get_self<VHash>()
332: refuses to compile
1.87 paf 333:
1.162 paf 334: template<typename T> T& get_self() {
335: return *static_cast<T*>(get_self().get());
336: }
337: */
1.6 paf 338:
1.173 paf 339: /// for @main[]
340: const String* execute_virtual_method(Value& aself, const String& method_name);
341:
342: /// for @postprocess[body]
343: StringOrValue execute_method(VMethodFrame& amethodFrame, const Method& method);
344: //{ for @conf[filespec] and @auto[filespec] and parser://method/call
345: const String* execute_method(Value& aself,
346: const Method& method, VString* optional_param,
347: bool do_return_string);
348: struct Execute_nonvirtual_method_result {
349: const String* string;
350: Method* method;
351: Execute_nonvirtual_method_result(): string(0), method(0) {}
352: };
353: Execute_nonvirtual_method_result execute_nonvirtual_method(VStateless_class& aclass,
354: const String& method_name, VString* optional_param,
355: bool do_return_string);
356: //}
357:
1.162 paf 358: #ifdef XML
359: public: // charset helpers
1.67 paf 360:
1.162 paf 361: /// @see Charset::transcode
362: GdomeDOMString_auto_ptr transcode(const String& s);
363: /// @see Charset::transcode
1.163 paf 364: GdomeDOMString_auto_ptr transcode(const String::Body s);
1.162 paf 365: /// @see Charset::transcode
366: const String& transcode(GdomeDOMString* s);
367: /// @see Charset::transcode
368: const String& transcode(xmlChar* s);
1.89 parser 369:
1.162 paf 370: #endif
1.136 paf 371:
372: private:
373:
374: /// already executed some @conf method
375: bool configure_admin_done;
376:
1.162 paf 377: void configure_admin(VStateless_class& conf_class);
1.177 paf 378:
379: void configure();
1.99 parser 380:
1.7 paf 381: private: // compile.C
382:
1.162 paf 383: VStateless_class& compile(VStateless_class* aclass,
384: const char* source, const String* main_alias,
1.175 paf 385: uint file_no,
386: int line_no_offset);
1.7 paf 387:
388: private: // execute.C
1.9 paf 389:
1.162 paf 390: Value& get_element(Value& ncontext, const String& name, bool can_call_operator);
1.22 paf 391:
1.58 paf 392: private: // defaults
393:
1.162 paf 394: const String::Language fdefault_lang;
1.80 paf 395:
396: private: // mime types
397:
398: /// $MAIN:MIME-TYPES
399: Table *mime_types;
1.22 paf 400:
1.39 paf 401: private: // lang manipulation
1.22 paf 402:
1.162 paf 403: String::Language set_lang(String::Language alang) {
404: String::Language result=flang;
1.39 paf 405: flang=alang;
406: return result;
407: }
1.162 paf 408: void restore_lang(String::Language alang) {
1.39 paf 409: flang=alang;
410: }
411:
1.117 paf 412: private: // connection manipulation
413:
1.162 paf 414: SQL_Connection* set_connection(SQL_Connection* aconnection) {
415: SQL_Connection* result=fconnection;
1.117 paf 416: fconnection=aconnection;
417: return result;
418: }
1.162 paf 419: void restore_connection(SQL_Connection* aconnection) {
1.117 paf 420: fconnection=aconnection;
421: }
422:
423: private:
424:
1.162 paf 425: void output_result(VFile* body_file, bool header_only, bool as_attachment);
1.148 paf 426: };
427:
428: /// Auto-object used to save request context across ^try body
429: class Request_context_saver {
430: Request& fr;
431:
432: /// exception stack trace
1.165 paf 433: size_t exception_trace_top;
434: size_t exception_trace_bottom;
1.148 paf 435: /// execution stack
1.162 paf 436: size_t stack;
1.166 paf 437: uint anti_endless_execute_recoursion;
1.148 paf 438: /// contexts
1.162 paf 439: VMethodFrame* method_frame;
440: Value* rcontext;
441: WContext* wcontext;
1.148 paf 442: /// current language
1.162 paf 443: String::Language flang;
1.148 paf 444: /// current connection
1.162 paf 445: SQL_Connection* fconnection;
1.126 paf 446:
1.148 paf 447: public:
448: Request_context_saver(Request& ar) :
1.171 paf 449: fr(ar),
1.165 paf 450: exception_trace_top(ar.exception_trace.top_index()),
451: exception_trace_bottom(ar.exception_trace.bottom_index()),
452: stack(ar.stack.top_index()),
1.166 paf 453: anti_endless_execute_recoursion(ar.anti_endless_execute_recoursion),
1.148 paf 454: method_frame(ar.method_frame),
455: rcontext(ar.rcontext),
456: wcontext(ar.wcontext),
457: flang(ar.flang),
1.171 paf 458: fconnection(ar.fconnection) {}
1.153 paf 459: void restore() {
1.165 paf 460: fr.exception_trace.set_top_index(exception_trace_top);
461: fr.exception_trace.set_bottom_index(exception_trace_bottom);
462: fr.stack.set_top_index(stack);
1.166 paf 463: fr.anti_endless_execute_recoursion=anti_endless_execute_recoursion;
1.157 paf 464: fr.method_frame=method_frame, fr.rcontext=rcontext; fr.wcontext=wcontext;
1.148 paf 465: fr.flang=flang;
466: fr.fconnection=fconnection;
467: }
1.39 paf 468: };
469:
1.61 paf 470: /// Auto-object used for temporary changing Request::flang.
1.39 paf 471: class Temp_lang {
472: Request& frequest;
1.162 paf 473: String::Language saved_lang;
1.39 paf 474: public:
1.162 paf 475: Temp_lang(Request& arequest, String::Language alang) :
1.39 paf 476: frequest(arequest),
477: saved_lang(arequest.set_lang(alang)) {
478: }
479: ~Temp_lang() {
480: frequest.restore_lang(saved_lang);
1.117 paf 481: }
482: };
483:
484: /// Auto-object used for temporary changing Request::fconnection.
485: class Temp_connection {
486: Request& frequest;
1.162 paf 487: SQL_Connection* saved_connection;
1.117 paf 488: public:
1.162 paf 489: Temp_connection(Request& arequest, SQL_Connection* aconnection) :
1.117 paf 490: frequest(arequest),
491: saved_connection(arequest.set_connection(aconnection)) {
492: }
493: ~Temp_connection() {
494: frequest.restore_connection(saved_connection);
1.39 paf 495: }
1.91 parser 496: };
497:
498:
1.162 paf 499: // defines for externs
1.91 parser 500:
1.162 paf 501: #define CONTENT_DISPOSITION_NAME "content-disposition"
502: #define CONTENT_DISPOSITION_VALUE "attachment"
503: #define CONTENT_DISPOSITION_FILENAME_NAME "filename"
1.170 paf 504: #define EXCEPTION_HANDLED_PART_NAME "handled"
505:
1.162 paf 506:
507: // externs
508:
509: extern const String main_method_name;
510: extern const String auto_method_name;
511: extern const String body_name;
512: extern const String content_disposition_name;
513: extern const String content_disposition_value;
514: extern const String content_disposition_filename_name;
515:
516: extern const String exception_type_part_name;
517: extern const String exception_source_part_name;
518: extern const String exception_comment_part_name;
519: extern const String exception_handled_part_name;
1.91 parser 520:
1.162 paf 521: // defines for statics
1.91 parser 522:
1.162 paf 523: #define MAIN_CLASS_NAME "MAIN"
524: #define AUTO_FILE_NAME "auto.p"
1.1 paf 525:
526: #endif
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