Annotation of parser3/src/include/pa_request.h, revision 1.259
1.61 paf 1: /** @file
1.62 paf 2: Parser: request class decl.
3:
1.258 moko 4: Copyright (c) 2001-2020 Art. Lebedev Studio (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:
1.259 ! moko 11: #define IDENT_PA_REQUEST_H "$Id: pa_request.h,v 1.258 2020/12/15 17:10:31 moko Exp $"
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:
1.257 moko 22: // defines for externs
23:
24: #define EXCEPTION_HANDLED_PART_NAME "handled"
25:
26:
27: // externs
28:
29: extern const String main_method_name;
30: extern const String auto_method_name;
31:
32: extern const String exception_type_part_name;
33: extern const String exception_source_part_name;
34: extern const String exception_comment_part_name;
35: extern const String exception_handled_part_name;
36:
37: // defines for statics
38:
39: #define MAIN_CLASS_NAME "MAIN"
40: #define AUTO_FILE_NAME "auto.p"
41:
1.128 paf 42: // consts
43:
1.162 paf 44: const size_t pseudo_file_no__process=1;
1.128 paf 45:
1.162 paf 46: // forwards
1.4 paf 47:
1.39 paf 48: class Temp_lang;
1.84 paf 49: class Methoded;
1.116 paf 50: class VMethodFrame;
1.162 paf 51: class VMail;
52: class VForm;
53: class VResponse;
54: class VCookie;
55: class VStateless_class;
1.215 moko 56: class VConsole;
1.1 paf 57:
1.244 moko 58: extern int pa_loop_limit;
1.229 moko 59: extern int pa_execute_recoursion_limit;
1.257 moko 60: extern int pa_httpd_timeout;
1.244 moko 61: extern size_t pa_file_size_limit;
1.229 moko 62:
1.61 paf 63: /// Main workhorse.
1.162 paf 64: class Request: public PA_Object {
1.107 paf 65: friend class Temp_lang;
1.117 paf 66: friend class Temp_connection;
1.214 moko 67: friend class Temp_request_self;
68: friend class Temp_value_element;
1.148 paf 69: friend class Request_context_saver;
1.162 paf 70: friend class Exception_trace;
71:
1.1 paf 72: public:
1.162 paf 73: class Trace {
74: const String* fname;
75: Operation::Origin forigin;
76: public:
77: Trace(): fname(0) {}
78: void clear() { fname=0; }
79:
80: Trace(const String* aname, const Operation::Origin aorigin):
81: fname(aname), forigin(aorigin) {}
82:
83: const String* name() const { return fname; }
84: const Operation::Origin origin() const { return forigin; }
85: };
86:
1.181 paf 87: enum Skip {
88: SKIP_NOTHING,
1.245 moko 89: SKIP_CONTINUE,
1.181 paf 90: SKIP_BREAK,
1.245 moko 91: SKIP_RETURN,
92: SKIP_INTERRUPTED
1.181 paf 93: };
94:
1.168 paf 95: private:
96: Pool fpool;
97: public:
98: Pool& pool() { return fpool; }
1.162 paf 99:
100: private:
101: union StackItem {
102: Value* fvalue;
103: ArrayOperation* fops;
104: VMethodFrame* fmethod_frame;
105: public:
106: Value& value() const { return *fvalue; }
107: const String& string() const {
1.167 paf 108: return fvalue->as_string();
1.162 paf 109: }
110: ArrayOperation& ops() const { return *fops; }
111: VMethodFrame& method_frame() const { return *fmethod_frame; }
112:
1.228 moko 113: StackItem(Value& avalue): fvalue(&avalue) {}
1.162 paf 114: StackItem(ArrayOperation& aops): fops(&aops) {}
115: StackItem(VMethodFrame& amethod_frame): fmethod_frame(&amethod_frame) {}
116: };
117:
118: class Exception_trace: public Stack<Trace> {
119: size_t fbottom;
120: public:
121: Exception_trace(): fbottom(0) {}
122:
123: size_t bottom_index() { return fbottom; }
1.165 paf 124: void set_bottom_index(size_t abottom) { fbottom=abottom; }
1.162 paf 125: element_type bottom_value() { return get(bottom_index()); }
126:
127: void clear() {
1.191 misha 128: fused=fbottom=0;
1.162 paf 129: }
130:
131: bool is_empty() {
1.191 misha 132: return fused==fbottom;
1.162 paf 133: }
1.259 ! moko 134:
! 135: Table &table(Request &r);
1.162 paf 136: };
137:
138: ///@{ core data
139:
140: /// classes
1.224 moko 141: HashString<VStateless_class*> fclasses;
1.162 paf 142:
143: /// already used files to avoid cyclic uses
1.193 misha 144: HashString<bool> used_files;
1.200 misha 145: HashString<bool> searched_along_class_path;
1.162 paf 146: /// list of all used files, Operation::file_no = index to it
1.163 paf 147: Array<String::Body> file_list;
1.162 paf 148:
1.229 moko 149: /// endless execute(execute(... preventing counter
1.243 moko 150: int anti_endless_execute_recoursion;
1.162 paf 151:
152: ///@}
153:
154: /// execution stack
155: Stack<StackItem> stack;
156:
157: /// exception stack trace
158: Exception_trace exception_trace;
159: public:
160:
1.213 moko 161: bool allow_class_replace;
162:
1.162 paf 163: //@{ request processing status
164: /// contexts
165: VMethodFrame* method_frame;
166: Value* rcontext;
167: WContext* wcontext;
168: /// current language
1.228 moko 169: String::Language flang;
1.162 paf 170: /// current connection
171: SQL_Connection* fconnection;
172: //@}
1.245 moko 173:
174: private:
175:
176: int fin_cycle;
1.181 paf 177: Skip fskip;
1.245 moko 178: VMethodFrame* freturn_method_frame;
1.162 paf 179:
180: public:
1.175 paf 181: uint register_file(String::Body file_spec);
1.162 paf 182:
183: struct Exception_details {
1.220 moko 184: const Operation::Origin origin;
1.162 paf 185: const String* problem_source;
186: VHash& vhash;
1.220 moko 187: Exception_details(const Operation::Origin aorigin, const String* aproblem_source, VHash& avhash): origin(aorigin), problem_source(aproblem_source), vhash(avhash) {}
1.162 paf 188: };
189: Exception_details get_details(const Exception& e);
1.176 paf 190: const char* get_exception_cstr(const Exception& e, Exception_details& details);
1.162 paf 191:
192: /// @see Stack::wipe_unused
193: void wipe_unused_execution_stack() {
194: stack.wipe_unused();
195: }
1.112 paf 196:
197: #ifdef RESOURCES_DEBUG
198: /// measures
199: double sql_connect_time;
200: double sql_request_time;
201: #endif
1.61 paf 202:
1.162 paf 203: Request(SAPI_Info& asapi_info, Request_info& arequest_info,
1.208 moko 204: String::Language adefault_lang ///< all tainted data default untainting lang
1.50 paf 205: );
1.118 paf 206: ~Request();
1.1 paf 207:
1.61 paf 208: /// global classes
1.224 moko 209: HashString<VStateless_class*>& classes() { return fclasses; }
210: VStateless_class* get_class(const String& name);
211: void put_class(VStateless_class *aclass){ classes().put(aclass->type(), aclass); }
1.6 paf 212:
1.65 paf 213: /**
214: core request processing
215: BEWARE: may throw exception to you: catch it!
216: */
1.257 moko 217: void core(const char* config_filespec, bool header_only, const String& amain_method_name = main_method_name);
1.17 paf 218:
1.61 paf 219: /// executes ops
1.162 paf 220: void execute(ArrayOperation& ops); // execute.C
1.239 moko 221:
222: template<typename Frame> void call(Frame& frame){
223: VMethodFrame *saved_method_frame=method_frame;
224: Value* saved_rcontext=rcontext;
225: WContext *saved_wcontext=wcontext;
226:
227: rcontext=wcontext=method_frame=&frame;
228:
229: frame.call(*this);
230:
231: wcontext=saved_wcontext;
232: rcontext=saved_rcontext;
233: method_frame=saved_method_frame;
234: }
235:
236: template<typename Frame> void call_write(Frame& frame){
237: VMethodFrame *saved_method_frame=method_frame;
238: Value* saved_rcontext=rcontext;
239:
240: rcontext=method_frame=&frame;
241:
242: frame.call(*this);
243:
244: rcontext=saved_rcontext;
245: method_frame=saved_method_frame;
246: }
247:
1.225 moko 248: Value& construct(VStateless_class &class_value, const Method &method);
1.202 moko 249:
1.127 paf 250: /// execute ops with anti-recoursion check
1.229 moko 251: void recoursion_checked_execute(ArrayOperation& ops) {
252: if(++anti_endless_execute_recoursion==pa_execute_recoursion_limit) {
1.128 paf 253: anti_endless_execute_recoursion=0; // give @exception a chance
1.228 moko 254: throw Exception(PARSER_RUNTIME, 0, "call canceled - endless recursion detected");
1.128 paf 255: }
1.147 paf 256: execute(ops); // execute it
1.128 paf 257: anti_endless_execute_recoursion--;
258: }
1.40 paf 259:
1.199 misha 260: ///
1.255 moko 261: void use_file_directly(const String& file_spec, bool fail_on_file_absence=true, bool with_auto_p=false);
1.228 moko 262:
1.255 moko 263: /// compiles the file in main class context by default
264: void use_file(const String& file_name, const String* use_filespec, bool with_auto_p=false);
1.241 moko 265:
266: /// for @USE only, calls ^use (which may be user-defined)
267: void use_file(const String& file_name, const String* use_filespec, Operation::Origin origin);
1.199 misha 268:
1.64 paf 269: /// compiles a @a source buffer
1.228 moko 270: void use_buf(VStateless_class& aclass, const char* source, const String* main_alias, uint file_no, int line_no_offset=0);
1.28 paf 271:
1.129 paf 272: /// processes any code-junction there may be inside of @a value
1.227 moko 273: Value& process_getter(Junction& junction); // execute.C
1.231 moko 274: Value& process(Value& input_value); // execute.C
1.192 misha 275: void process_write(Value& input_value); // execute.C
1.228 moko 276:
1.129 paf 277: //@{ convinient helpers
278: const String& process_to_string(Value& input_value) {
1.231 moko 279: return process(input_value).as_string();
1.129 paf 280: }
1.126 paf 281: //@}
1.247 moko 282: const Operation::Origin get_method_origin(const Method* method); // execute.C
1.242 moko 283: const String* get_method_filespec(const Method* method); // execute.C
284: const String* get_used_filespec(uint file_no);
1.126 paf 285:
1.238 moko 286: /// appending string with it's languages
1.239 moko 287: inline void write(const String& astring) {
1.236 moko 288: wcontext->write(astring);
1.49 paf 289: }
1.238 moko 290:
291: /// in [] and {} appending string if get_string is not null, else appending value
1.240 moko 292: /// in () appending string if is_string, else appending value
1.239 moko 293: inline void write(Value& avalue) {
1.236 moko 294: wcontext->write_as_string(avalue);
1.131 paf 295: }
296:
1.238 moko 297: /// allways appending value
1.239 moko 298: inline void write_value(Value& avalue) {
1.226 moko 299: wcontext->write(avalue);
300: }
301:
1.64 paf 302: /// returns relative to @a path path to @a file
1.162 paf 303: const String& relative(const char* apath, const String& relative_name);
1.61 paf 304:
1.256 moko 305: const String& full_disk_path(const String& relative_name);
1.42 paf 306:
1.209 misha 307: /// returns the mime type of 'user_file_name'
308: const String& mime_type_of(const String* file_name);
309:
1.80 paf 310: /// returns the mime type of 'user_file_name_cstr'
1.162 paf 311: const String& mime_type_of(const char* user_file_name_cstr);
1.80 paf 312:
1.117 paf 313: /// returns current SQL connection if any
1.228 moko 314: SQL_Connection* connection(bool fail_on_error=true) {
1.162 paf 315: if(fail_on_error && !fconnection)
1.228 moko 316: throw Exception(PARSER_RUNTIME, 0, "outside of 'connect' operator");
317: return fconnection;
1.133 paf 318: }
319:
1.245 moko 320: Skip get_skip() { return fskip; }
1.181 paf 321: void set_skip(Skip askip) { fskip=askip; }
1.246 moko 322: void set_skip_return(VMethodFrame& amethod_frame) { fskip=SKIP_RETURN; freturn_method_frame=&amethod_frame; }
1.245 moko 323: inline bool check_skip_break() { bool result=fskip >= SKIP_BREAK; if(fskip <= SKIP_BREAK) fskip=SKIP_NOTHING; return result; }
324: inline void check_skip_return() { if(fskip==SKIP_RETURN && method_frame==freturn_method_frame) fskip=SKIP_NOTHING; }
1.181 paf 325:
1.196 misha 326: void set_in_cycle(int adelta) { fin_cycle+=adelta; }
327: bool get_in_cycle() { return fin_cycle>0; }
328:
1.17 paf 329: public:
1.22 paf 330:
1.61 paf 331: /// info from web server
1.162 paf 332: Request_info& request_info;
333:
334: /// info about ServerAPI
335: SAPI_Info& sapi_info;
336:
337: /// source, client, mail charsets
338: Request_charsets charsets;
1.53 paf 339:
1.154 paf 340: /// 'MAIN' class conglomerat & operators are methods of this class
1.162 paf 341: VStateless_class& main_class;
1.86 paf 342: /// $form:elements
1.162 paf 343: VForm& form;
1.140 paf 344: /// $mail
1.162 paf 345: VMail& mail;
1.86 paf 346: /// $response:elements
1.162 paf 347: VResponse& response;
1.86 paf 348: /// $cookie:elements
1.162 paf 349: VCookie& cookie;
1.183 misha 350: /// $console
351: VConsole& console;
1.70 paf 352:
1.148 paf 353: /// classes configured data
1.193 misha 354: HashString<void*> classes_conf;
1.85 paf 355:
1.148 paf 356: public: // status read methods
1.76 paf 357:
1.148 paf 358: VMethodFrame *get_method_frame() { return method_frame; }
1.162 paf 359: Value& get_self();
1.227 moko 360:
1.162 paf 361: #define GET_SELF(request, type) (static_cast<type &>(request.get_self()))
1.6 paf 362:
1.205 moko 363: /// public for ^reflection:copy[]
364: void put_element(Value& ncontext, const String& name, Value* value);
365:
1.251 moko 366: /// for @main[] and parser://method/call
367: const String* execute_method(VStateless_class& aclass, const String& method_name, Value* optional_param = 0);
1.173 paf 368:
1.251 moko 369: //{ for @conf[filespec] and @auto[filespec]
370: bool execute_method_if_exists(VStateless_class& aclass, const String& method_name, Value* optional_param);
1.228 moko 371:
1.173 paf 372: //}
373:
1.162 paf 374: #ifdef XML
375: public: // charset helpers
1.67 paf 376:
1.162 paf 377: /// @see Charset::transcode
1.180 paf 378: xmlChar* transcode(const String& s);
1.162 paf 379: /// @see Charset::transcode
1.180 paf 380: xmlChar* transcode(const String::Body s);
1.162 paf 381: /// @see Charset::transcode
1.180 paf 382: const String& transcode(const xmlChar* s);
1.89 parser 383:
1.162 paf 384: #endif
1.136 paf 385:
386: private:
387:
388: /// already executed some @conf method
389: bool configure_admin_done;
390:
1.162 paf 391: void configure_admin(VStateless_class& conf_class);
1.177 paf 392:
393: void configure();
1.99 parser 394:
1.7 paf 395: private: // compile.C
396:
1.228 moko 397: ArrayClass& compile(VStateless_class* aclass, const char* source, const String* main_alias, uint file_no, int line_no_offset);
1.7 paf 398:
399: private: // execute.C
1.9 paf 400:
1.191 misha 401: Value& get_element(Value& ncontext, const String& name);
1.219 moko 402: #ifdef FEATURE_GET_ELEMENT4CALL
403: Value& get_element4call(Value& ncontext, const String& name);
404: #endif
1.22 paf 405:
1.58 paf 406: private: // defaults
407:
1.162 paf 408: const String::Language fdefault_lang;
1.80 paf 409:
410: private: // mime types
411:
412: /// $MAIN:MIME-TYPES
413: Table *mime_types;
1.22 paf 414:
1.117 paf 415: private: // connection manipulation
416:
1.162 paf 417: SQL_Connection* set_connection(SQL_Connection* aconnection) {
418: SQL_Connection* result=fconnection;
1.117 paf 419: fconnection=aconnection;
420: return result;
421: }
1.162 paf 422: void restore_connection(SQL_Connection* aconnection) {
1.117 paf 423: fconnection=aconnection;
424: }
425:
426: private:
427:
1.162 paf 428: void output_result(VFile* body_file, bool header_only, bool as_attachment);
1.148 paf 429: };
430:
431: /// Auto-object used to save request context across ^try body
432: class Request_context_saver {
433: Request& fr;
434:
435: /// exception stack trace
1.165 paf 436: size_t exception_trace_top;
437: size_t exception_trace_bottom;
1.148 paf 438: /// execution stack
1.162 paf 439: size_t stack;
1.166 paf 440: uint anti_endless_execute_recoursion;
1.148 paf 441: /// contexts
1.162 paf 442: VMethodFrame* method_frame;
443: Value* rcontext;
444: WContext* wcontext;
1.148 paf 445: /// current language
1.162 paf 446: String::Language flang;
1.148 paf 447: /// current connection
1.162 paf 448: SQL_Connection* fconnection;
1.126 paf 449:
1.148 paf 450: public:
1.228 moko 451: Request_context_saver(Request& ar) :
1.171 paf 452: fr(ar),
1.228 moko 453: exception_trace_top(ar.exception_trace.top_index()),
454: exception_trace_bottom(ar.exception_trace.bottom_index()),
1.165 paf 455: stack(ar.stack.top_index()),
1.166 paf 456: anti_endless_execute_recoursion(ar.anti_endless_execute_recoursion),
1.148 paf 457: method_frame(ar.method_frame),
458: rcontext(ar.rcontext),
459: wcontext(ar.wcontext),
460: flang(ar.flang),
1.171 paf 461: fconnection(ar.fconnection) {}
1.153 paf 462: void restore() {
1.165 paf 463: fr.exception_trace.set_top_index(exception_trace_top);
464: fr.exception_trace.set_bottom_index(exception_trace_bottom);
465: fr.stack.set_top_index(stack);
1.166 paf 466: fr.anti_endless_execute_recoursion=anti_endless_execute_recoursion;
1.157 paf 467: fr.method_frame=method_frame, fr.rcontext=rcontext; fr.wcontext=wcontext;
1.148 paf 468: fr.flang=flang;
469: fr.fconnection=fconnection;
470: }
1.39 paf 471: };
472:
1.117 paf 473: /// Auto-object used for temporary changing Request::fconnection.
474: class Temp_connection {
475: Request& frequest;
1.162 paf 476: SQL_Connection* saved_connection;
1.117 paf 477: public:
1.228 moko 478: Temp_connection(Request& arequest, SQL_Connection* aconnection) :
1.117 paf 479: frequest(arequest),
480: saved_connection(arequest.set_connection(aconnection)) {
481: }
1.228 moko 482: ~Temp_connection() {
1.117 paf 483: frequest.restore_connection(saved_connection);
1.39 paf 484: }
1.91 parser 485: };
486:
1.196 misha 487: /// Auto-object used for break out of cycle check
488: class InCycle {
489: Request& frequest;
490: public:
491: InCycle(Request& arequest) : frequest(arequest) {
492: frequest.set_in_cycle(1);
493: }
1.228 moko 494: ~InCycle() {
1.196 misha 495: frequest.set_in_cycle(-1);
496: }
497: };
1.91 parser 498:
1.245 moko 499: /// Auto-object used for break out of cycle check
500: class TempSkip4Delimiter {
501: Request& frequest;
502: Request::Skip fskip;
503: public:
504: TempSkip4Delimiter(Request& arequest) : frequest(arequest), fskip(arequest.get_skip()) {
505: frequest.set_skip(Request::SKIP_NOTHING);
506: }
507: // returns true if break required, should be called
508: bool check_break() {
509: if(frequest.get_skip())
510: fskip=frequest.get_skip();
511: frequest.set_skip(fskip <= Request::SKIP_BREAK ? Request::SKIP_NOTHING : fskip);
512: return fskip >= Request::SKIP_BREAK;
513: }
514: };
515:
1.213 moko 516: /// Auto-object used for temporary changing Request::allow_class_replace.
517: class Temp_class_replace {
518: Request& frequest;
519: public:
520: Temp_class_replace(Request& arequest, bool avalue) : frequest(arequest){
521: frequest.allow_class_replace=avalue;
522: }
523: ~Temp_class_replace() {
524: frequest.allow_class_replace=false;
525: }
526: };
527:
1.214 moko 528: /// Auto-object used for temporarily substituting/removing elements
529: class Temp_value_element {
530: Request& frequest;
531: Value& fwhere;
532: const String& fname;
1.216 moko 533: Value* saved;
1.214 moko 534: public:
1.216 moko 535: Temp_value_element(Request& arequest, Value& awhere, const String& aname, Value* awhat);
536: ~Temp_value_element();
1.214 moko 537: };
538:
1.1 paf 539: #endif
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