Annotation of parser3/src/types/pa_vcookie.C, revision 1.81
1.6 paf 1: /** @file
2: Parser: cookie class.
3:
1.76 misha 4: Copyright(c) 2001-2009 ArtLebedev Group (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:
1.81 ! misha 8: static const char * const IDENT_VCOOKIE_C="$Date: 2009-08-08 13:30:21 $";
1.1 paf 9:
1.11 paf 10: #include "pa_sapi.h"
1.3 paf 11: #include "pa_common.h"
1.1 paf 12: #include "pa_vcookie.h"
13: #include "pa_vstring.h"
1.49 paf 14: #include "pa_vdate.h"
1.56 paf 15: #include "pa_vhash.h"
1.74 misha 16: #include "pa_request.h"
1.56 paf 17:
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) {
1.28 parser 41: // $CLASS
1.46 paf 42: if(aname==CLASS_NAME)
1.28 parser 43: return this;
44:
1.76 misha 45: // $CLASS_NAME
46: if(aname==CLASS_NAMETEXT)
47: return new VString(cookie_class_name);
48:
1.74 misha 49: // $fields
1.72 misha 50: if(aname==COOKIE_FIELDS_ELEMENT_NAME){
1.74 misha 51: if(should_refill())
52: refill();
53:
54: HashStringValue *result=new HashStringValue(before);
1.72 misha 55: after.for_each<HashStringValue*>(copy_all_overwrite_to, result);
56: deleted.for_each<HashStringValue*>(remove_key_from, result);
57: return new VHash(*result);
58: }
59:
1.1 paf 60: // $cookie
1.46 paf 61: if(deleted.get(aname)) // deleted?
1.1 paf 62: return 0;
63:
1.56 paf 64: if(Value* after_meaning=after.get(aname)) // assigned 'after'?
65: if(HashStringValue *hash=after_meaning->get_hash())
66: return hash->get(value_name);
1.2 paf 67: else
68: return after_meaning;
1.1 paf 69:
1.74 misha 70: if(should_refill())
71: refill();
72:
1.1 paf 73: // neither deleted nor assigned
74: // return any value it had 'before'
1.56 paf 75: return before.get(aname);
1.1 paf 76: }
77:
1.80 misha 78: const VJunction* VCookie::put_element(const String& aname, Value* avalue, bool /*replace*/) {
1.1 paf 79: // $cookie
1.56 paf 80: Value* lvalue;
81: if(HashStringValue *hash=avalue->get_hash())
82: lvalue=hash->get(value_name);
1.1 paf 83: else
1.50 paf 84: lvalue=avalue;
1.51 paf 85:
86: if(lvalue && lvalue->is_string()) {
87: // taint string being assigned
1.56 paf 88: String& tainted=*new String;
89: tainted.append(*lvalue->get_string(), String::L_TAINTED, true /*forced*/);
90: lvalue=new VString(tainted);
1.51 paf 91: }
1.1 paf 92:
1.71 misha 93: if( !lvalue || lvalue->as_string().is_empty() ) {
94: deleted.put(aname, avalue);
95: after.put(aname, 0);
96: } else {
97: after.put(aname, avalue);
98: deleted.put(aname, 0);
99: }
1.64 paf 100: return PUT_ELEMENT_REPLACED_ELEMENT;
1.1 paf 101: }
102:
1.26 parser 103: static char *search_stop(char*& current, char cstop_at) {
1.37 paf 104: // sanity check
105: if(!current)
106: return 0;
107:
1.26 parser 108: // skip leading WS
109: while(*current==' ' || *current=='\t')
110: current++;
111: if(!*current)
112: return current=0;
113:
114: char *result=current;
115: if(char *pstop_at=strchr(current, cstop_at)) {
116: *pstop_at=0;
117: current=pstop_at+1;
118: } else
119: current=0;
120: return result;
121: }
122:
123:
1.56 paf 124: static Value& expires_vdate(double days_till_expire) {
1.1 paf 125: time_t when=time(NULL)+(time_t)(60*60*24*days_till_expire);
126: struct tm *tms=gmtime(&when);
1.41 paf 127: if(!tms)
1.75 misha 128: throw Exception(DATE_RANGE_EXCEPTION_TYPE,
1.56 paf 129: 0,
1.62 paf 130: "bad expires time (seconds from epoch=%u)", when);
1.49 paf 131:
1.56 paf 132: return *new VDate(when);
1.1 paf 133: }
134:
1.25 parser 135: /*
1.49 paf 136: @todo
1.73 misha 137: http://wp.netscape.com/newsref/std/cookie_spec.html
1.25 parser 138: When sending cookies to a server,
139: all cookies with a more specific path mapping should be sent before cookies
140: with less specific path mappings.
141: For example, a cookie "name1=foo" with a path mapping of "/" should be sent after
142: a cookie "name1=foo2" with a path mapping of "/bar" if they are both to be sent.
143:
1.74 misha 144: There are limitations on the number of cookies that a client can store at any one time.
145: This is a specification of the minimum number of cookies that a client should be prepared
146: to receive and store.
147: 300 total cookies
148: 4 kilobytes per cookie, where the name and the OPAQUE_STRING combine
149: to form the 4 kilobyte limit.
150: 20 cookies per server or domain. (note that completely specified hosts
151: and domains are treated as separate entities and have a 20 cookie limitation
152: for each, not combined)
1.25 parser 153: */
1.74 misha 154:
155: const String* output_set_cookie_value(
156: HashStringValue::key_type aname,
157: HashStringValue::value_type ameaning,
158: bool adelete){
159: String* result=new String();
1.1 paf 160: // attribute=
1.79 misha 161: *result << String(aname, String::L_HTTP_COOKIE) << "=";
1.74 misha 162:
1.56 paf 163: Value* lmeaning;
1.1 paf 164: // figure out 'meaning'
1.61 paf 165: // Set-Cookie: (attribute)=(value); path=/
166: HashStringValue *hash;
167: double default_expires_days=adelete?-DEFAULT_EXPIRES_DAYS:+DEFAULT_EXPIRES_DAYS;
168: if((hash=ameaning->get_hash())) { // ...[hash value]
169: // clone to safely change it
1.74 misha 170: lmeaning=new VHash(*hash);
171: hash=lmeaning->get_hash();
172:
1.61 paf 173: // $expires
174: if(Value* expires=hash->get(expires_name)) {
175: const String* string;
176: if(expires->is_string() && (string=expires->get_string()) && (*string==SESSION_NAME)) {
177: // $expires[session]
178: hash->remove(expires_name);
179: } else {
1.80 misha 180: if(Value* vdate=expires->as(VDATE_TYPE))
1.61 paf 181: hash->put(expires_name, vdate); // $expires[DATE]
182: else if(double days_till_expire=expires->as_double())
183: hash->put(expires_name, &expires_vdate(days_till_expire)); // $expires(days)
184: else
185: hash->remove(expires_name); // $expires(0)
186: }
187: } else // $expires not assigned, defaulting
188: hash->put(expires_name, &expires_vdate(default_expires_days));
189: } else { // ...[string value]
190: Value* wrap_meaning=new VHash;
191: hash=wrap_meaning->get_hash();
192: // wrapping lmeaning into hash
193: hash->put(value_name, ameaning);
194: // string = $expires not assigned, defaulting
195: hash->put(expires_name, &expires_vdate(default_expires_days));
196: // replacing lmeaning with hash-wrapped one
197: lmeaning=wrap_meaning;
198: }
199:
200: if(adelete) {// removing value
1.25 parser 201: /*
1.73 misha 202: http://wp.netscape.com/newsref/std/cookie_spec.html
1.25 parser 203: to delete a cookie, it can do so by returning a cookie with the same name,
204: and an expires time which is in the past
205: */
206:
1.1 paf 207: // Set-Cookie: (attribute)=; path=/
1.61 paf 208: lmeaning->get_hash()->remove(value_name);
1.1 paf 209: }
1.74 misha 210:
1.1 paf 211: // defaulting path
1.56 paf 212: if(!lmeaning->get_hash()->get(path_name))
1.74 misha 213: lmeaning->get_hash()->put(path_name, new VString(path_value_default));
1.1 paf 214:
1.56 paf 215: // append lmeaning
1.74 misha 216: *result << attributed_meaning_to_string(*lmeaning, String::L_HTTP_COOKIE, true, true /* allow bool attr */);
1.1 paf 217:
1.74 misha 218: return result;
1.1 paf 219: }
1.74 misha 220:
221:
222: struct Cookie_pass_info {
223: SAPI_Info* sapi_info;
224: Request_charsets* charsets;
225: };
226:
227: void output_set_cookie_header(
228: HashStringValue::key_type aattribute,
229: HashStringValue::value_type ameaning,
230: bool adelete,
231: Cookie_pass_info& cookie_info
232: ){
1.81 ! misha 233: SAPI::add_header_attribute(*cookie_info.sapi_info, "Set-Cookie",
1.79 misha 234: output_set_cookie_value(aattribute, ameaning, adelete)->untaint_cstr(String::L_AS_IS, 0, cookie_info.charsets));
1.56 paf 235: }
1.74 misha 236:
237: void output_after(
238: HashStringValue::key_type aattribute,
239: HashStringValue::value_type ameaning,
240: Cookie_pass_info& cookie_info
241: ){
242: output_set_cookie_header(aattribute, ameaning, false, cookie_info);
243: }
244:
245: void output_deleted(
246: HashStringValue::key_type aattribute,
247: HashStringValue::value_type ameaning,
248: Cookie_pass_info& cookie_info
249: ){
250: if(ameaning)
251: output_set_cookie_header(aattribute, ameaning, true, cookie_info);
252: }
253:
1.56 paf 254: void VCookie::output_result(SAPI_Info& sapi_info) {
1.74 misha 255: Cookie_pass_info cookie_info={&sapi_info, &fcharsets};
256:
257: after.for_each<Cookie_pass_info&>(output_after, cookie_info);
258: deleted.for_each<Cookie_pass_info&>(output_deleted, cookie_info);
259: }
260:
261: bool VCookie::should_refill(){
262: return !(
263: &fcharsets.source()==filled_source
264: && &fcharsets.client()==filled_client
265: );
266: }
267:
268: //#include <stdio.h>
269: void VCookie::refill(){
270: //request_info.cookie="test-session=value%3D5; test-default1=value%3D1; test-default2=value%3D2; test-tomorrow=value%3D3";
271: //request_info.cookie="enabled=yes; auth.uid=196325308053599810; enabled=yes; msnames; msuri"; // mdm
272: if(!frequest_info.cookie)
273: return;
274: /*
275: FILE *f=fopen("c:\\temp\\a", "wt");
276: fprintf(f, "cookie=%s", request_info.cookie);
277: fclose(f);
278: */
279: char *cookies=strdup(frequest_info.cookie);
280: char *current=cookies;
281: //_asm int 3;
282: do {
283: if(char *attribute=search_stop(current, '='))
284: if(char *meaning=search_stop(current, ';')) {
285: const String& sattribute=
1.78 misha 286: *new String(unescape_chars(attribute, strlen(attribute), &fcharsets.source(), true/*don't convert '"' to space*/), String::L_TAINTED);
1.74 misha 287: const String& smeaning=
1.78 misha 288: *new String(unescape_chars(meaning, strlen(meaning), &fcharsets.source(), true/*don't convert '"' to space*/), String::L_TAINTED);
1.74 misha 289: before.put(sattribute, new VString(smeaning));
290:
291: //if(sattribute == "test_js") throw Exception(0, 0, "'%s' '%s'", meaning, smeaning.cstr());
292: }
293: } while(current);
294:
295: filled_source=&fcharsets.source();
296: filled_client=&fcharsets.client();
1.1 paf 297: }
1.74 misha 298:
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