Annotation of parser3/src/types/pa_vcookie.C, revision 1.95
1.6 paf 1: /** @file
2: Parser: cookie class.
3:
1.93 moko 4: Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com)
1.34 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.44 paf 6: */
1.6 paf 7:
1.11 paf 8: #include "pa_sapi.h"
1.3 paf 9: #include "pa_common.h"
1.1 paf 10: #include "pa_vcookie.h"
11: #include "pa_vstring.h"
1.49 paf 12: #include "pa_vdate.h"
1.56 paf 13: #include "pa_vhash.h"
1.74 misha 14: #include "pa_request.h"
1.56 paf 15:
1.95 ! moko 16: volatile const char * IDENT_PA_VCOOKIE_C="$Id: pa_vcookie.C,v 1.94 2016/04/06 22:11:43 moko Exp $" IDENT_PA_VCOOKIE_H;
1.86 moko 17:
1.56 paf 18: // defines
19:
20: #define PATH_NAME "path"
21: #define PATH_VALUE_DEFAULT "/"
1.1 paf 22:
23: #define SESSION_NAME "session"
24: #define DEFAULT_EXPIRES_DAYS 90
1.9 paf 25:
1.72 misha 26: #define COOKIE_FIELDS_ELEMENT_NAME "fields"
27:
1.56 paf 28: // statics
29:
30: static const String path_name(PATH_NAME);
31: static const String path_value_default(PATH_VALUE_DEFAULT);
32:
1.1 paf 33: // VCookie
34:
1.74 misha 35: VCookie::VCookie(Request_charsets& acharsets, Request_info& arequest_info):
36: fcharsets(acharsets),
37: frequest_info(arequest_info) {
38: }
39:
1.80 misha 40: Value* VCookie::get_element(const String& aname) {
1.95 ! moko 41: #ifndef OPTIMIZE_BYTECODE_GET_ELEMENT__SPECIAL
! 42: // CLASS, CLASS_NAME
1.94 moko 43: if(Value* result=VStateless_class::get_element(aname))
44: return result;
1.95 ! moko 45: #endif
1.76 misha 46:
1.74 misha 47: // $fields
1.72 misha 48: if(aname==COOKIE_FIELDS_ELEMENT_NAME){
1.74 misha 49: if(should_refill())
50: refill();
51:
52: HashStringValue *result=new HashStringValue(before);
1.72 misha 53: after.for_each<HashStringValue*>(copy_all_overwrite_to, result);
54: deleted.for_each<HashStringValue*>(remove_key_from, result);
55: return new VHash(*result);
56: }
57:
1.1 paf 58: // $cookie
1.46 paf 59: if(deleted.get(aname)) // deleted?
1.1 paf 60: return 0;
61:
1.90 moko 62: if(Value* after_meaning=after.get(aname)) { // assigned 'after'?
1.56 paf 63: if(HashStringValue *hash=after_meaning->get_hash())
64: return hash->get(value_name);
1.2 paf 65: else
66: return after_meaning;
1.90 moko 67: }
1.1 paf 68:
1.74 misha 69: if(should_refill())
70: refill();
71:
1.1 paf 72: // neither deleted nor assigned
73: // return any value it had 'before'
1.56 paf 74: return before.get(aname);
1.1 paf 75: }
76:
1.84 misha 77: time_t expires_sec(double days_till_expire) {
78: time_t result=time(NULL)+(time_t)(60*60*24*days_till_expire);
79: struct tm* tms=gmtime(&result);
80: if(!tms)
81: throw Exception(DATE_RANGE_EXCEPTION_TYPE,
82: 0,
83: "bad expires time (seconds from epoch=%u)", result);
84: return result;
85: }
86:
1.88 moko 87: const VJunction* VCookie::put_element(const String& aname, Value* avalue) {
1.1 paf 88: // $cookie
1.56 paf 89: Value* lvalue;
1.84 misha 90: if(HashStringValue *hash=avalue->get_hash()) {
1.85 misha 91: if(Value* expires=hash->get(expires_name)){
92: const String* string;
93: if(!(expires->is_string() && (string=expires->get_string()) && (*string==SESSION_NAME)))
1.92 moko 94: if(!expires->as(VDATE_TYPE))
95: if(double days_till_expire=expires->as_double())
96: expires_sec(days_till_expire);
1.85 misha 97: }
1.56 paf 98: lvalue=hash->get(value_name);
1.84 misha 99: } else
1.50 paf 100: lvalue=avalue;
1.51 paf 101:
102: if(lvalue && lvalue->is_string()) {
103: // taint string being assigned
1.56 paf 104: String& tainted=*new String;
105: tainted.append(*lvalue->get_string(), String::L_TAINTED, true /*forced*/);
106: lvalue=new VString(tainted);
1.51 paf 107: }
1.1 paf 108:
1.71 misha 109: if( !lvalue || lvalue->as_string().is_empty() ) {
110: deleted.put(aname, avalue);
111: after.put(aname, 0);
112: } else {
113: after.put(aname, avalue);
114: deleted.put(aname, 0);
115: }
1.64 paf 116: return PUT_ELEMENT_REPLACED_ELEMENT;
1.1 paf 117: }
118:
1.56 paf 119: static Value& expires_vdate(double days_till_expire) {
1.91 moko 120: return *new VDate((pa_time_t)expires_sec(days_till_expire));
1.1 paf 121: }
122:
1.25 parser 123: /*
1.49 paf 124: @todo
1.87 misha 125: http://curl.haxx.se/rfc/cookie_spec.html
126: http://www.w3.org/Protocols/rfc2109/rfc2109
1.25 parser 127: When sending cookies to a server,
128: all cookies with a more specific path mapping should be sent before cookies
129: with less specific path mappings.
130: For example, a cookie "name1=foo" with a path mapping of "/" should be sent after
131: a cookie "name1=foo2" with a path mapping of "/bar" if they are both to be sent.
132:
1.74 misha 133: There are limitations on the number of cookies that a client can store at any one time.
134: This is a specification of the minimum number of cookies that a client should be prepared
135: to receive and store.
136: 300 total cookies
137: 4 kilobytes per cookie, where the name and the OPAQUE_STRING combine
138: to form the 4 kilobyte limit.
139: 20 cookies per server or domain. (note that completely specified hosts
140: and domains are treated as separate entities and have a 20 cookie limitation
141: for each, not combined)
1.25 parser 142: */
1.74 misha 143:
144: const String* output_set_cookie_value(
145: HashStringValue::key_type aname,
146: HashStringValue::value_type ameaning,
147: bool adelete){
148: String* result=new String();
1.1 paf 149: // attribute=
1.79 misha 150: *result << String(aname, String::L_HTTP_COOKIE) << "=";
1.74 misha 151:
1.56 paf 152: Value* lmeaning;
1.1 paf 153: // figure out 'meaning'
1.61 paf 154: // Set-Cookie: (attribute)=(value); path=/
155: HashStringValue *hash;
156: double default_expires_days=adelete?-DEFAULT_EXPIRES_DAYS:+DEFAULT_EXPIRES_DAYS;
157: if((hash=ameaning->get_hash())) { // ...[hash value]
158: // clone to safely change it
1.74 misha 159: lmeaning=new VHash(*hash);
160: hash=lmeaning->get_hash();
161:
1.61 paf 162: // $expires
163: if(Value* expires=hash->get(expires_name)) {
164: const String* string;
165: if(expires->is_string() && (string=expires->get_string()) && (*string==SESSION_NAME)) {
166: // $expires[session]
167: hash->remove(expires_name);
168: } else {
1.80 misha 169: if(Value* vdate=expires->as(VDATE_TYPE))
1.61 paf 170: hash->put(expires_name, vdate); // $expires[DATE]
171: else if(double days_till_expire=expires->as_double())
172: hash->put(expires_name, &expires_vdate(days_till_expire)); // $expires(days)
173: else
174: hash->remove(expires_name); // $expires(0)
175: }
176: } else // $expires not assigned, defaulting
177: hash->put(expires_name, &expires_vdate(default_expires_days));
178: } else { // ...[string value]
179: Value* wrap_meaning=new VHash;
180: hash=wrap_meaning->get_hash();
181: // wrapping lmeaning into hash
182: hash->put(value_name, ameaning);
183: // string = $expires not assigned, defaulting
184: hash->put(expires_name, &expires_vdate(default_expires_days));
185: // replacing lmeaning with hash-wrapped one
186: lmeaning=wrap_meaning;
187: }
188:
189: if(adelete) {// removing value
1.25 parser 190: /*
1.87 misha 191: http://curl.haxx.se/rfc/cookie_spec.html
192: http://www.w3.org/Protocols/rfc2109/rfc2109
1.25 parser 193: to delete a cookie, it can do so by returning a cookie with the same name,
194: and an expires time which is in the past
195: */
196:
1.1 paf 197: // Set-Cookie: (attribute)=; path=/
1.61 paf 198: lmeaning->get_hash()->remove(value_name);
1.1 paf 199: }
1.74 misha 200:
1.1 paf 201: // defaulting path
1.56 paf 202: if(!lmeaning->get_hash()->get(path_name))
1.74 misha 203: lmeaning->get_hash()->put(path_name, new VString(path_value_default));
1.1 paf 204:
1.56 paf 205: // append lmeaning
1.74 misha 206: *result << attributed_meaning_to_string(*lmeaning, String::L_HTTP_COOKIE, true, true /* allow bool attr */);
1.1 paf 207:
1.74 misha 208: return result;
1.1 paf 209: }
1.74 misha 210:
211:
212: struct Cookie_pass_info {
213: SAPI_Info* sapi_info;
214: Request_charsets* charsets;
215: };
216:
217: void output_set_cookie_header(
218: HashStringValue::key_type aattribute,
219: HashStringValue::value_type ameaning,
220: bool adelete,
221: Cookie_pass_info& cookie_info
222: ){
1.82 misha 223: SAPI::add_header_attribute(*cookie_info.sapi_info, "set-cookie",
1.79 misha 224: output_set_cookie_value(aattribute, ameaning, adelete)->untaint_cstr(String::L_AS_IS, 0, cookie_info.charsets));
1.56 paf 225: }
1.74 misha 226:
227: void output_after(
228: HashStringValue::key_type aattribute,
229: HashStringValue::value_type ameaning,
230: Cookie_pass_info& cookie_info
231: ){
232: output_set_cookie_header(aattribute, ameaning, false, cookie_info);
233: }
234:
235: void output_deleted(
236: HashStringValue::key_type aattribute,
237: HashStringValue::value_type ameaning,
238: Cookie_pass_info& cookie_info
239: ){
240: if(ameaning)
241: output_set_cookie_header(aattribute, ameaning, true, cookie_info);
242: }
243:
1.56 paf 244: void VCookie::output_result(SAPI_Info& sapi_info) {
1.74 misha 245: Cookie_pass_info cookie_info={&sapi_info, &fcharsets};
246:
247: after.for_each<Cookie_pass_info&>(output_after, cookie_info);
248: deleted.for_each<Cookie_pass_info&>(output_deleted, cookie_info);
249: }
250:
251: bool VCookie::should_refill(){
252: return !(
253: &fcharsets.source()==filled_source
254: && &fcharsets.client()==filled_client
255: );
256: }
257:
258: //#include <stdio.h>
259: void VCookie::refill(){
260: //request_info.cookie="test-session=value%3D5; test-default1=value%3D1; test-default2=value%3D2; test-tomorrow=value%3D3";
261: //request_info.cookie="enabled=yes; auth.uid=196325308053599810; enabled=yes; msnames; msuri"; // mdm
262: if(!frequest_info.cookie)
263: return;
264: /*
265: FILE *f=fopen("c:\\temp\\a", "wt");
266: fprintf(f, "cookie=%s", request_info.cookie);
267: fclose(f);
268: */
269: char *cookies=strdup(frequest_info.cookie);
270: char *current=cookies;
271: //_asm int 3;
272: do {
273: if(char *attribute=search_stop(current, '='))
274: if(char *meaning=search_stop(current, ';')) {
275: const String& sattribute=
1.83 misha 276: *new String(unescape_chars(attribute, strlen(attribute), &fcharsets.source(), true), String::L_TAINTED);
1.74 misha 277: const String& smeaning=
1.83 misha 278: *new String(unescape_chars(meaning, strlen(meaning), &fcharsets.source(), true), String::L_TAINTED);
1.74 misha 279: before.put(sattribute, new VString(smeaning));
280:
281: //if(sattribute == "test_js") throw Exception(0, 0, "'%s' '%s'", meaning, smeaning.cstr());
282: }
283: } while(current);
284:
285: filled_source=&fcharsets.source();
286: filled_client=&fcharsets.client();
1.1 paf 287: }
1.74 misha 288:
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