Annotation of parser3/src/types/pa_vcookie.C, revision 1.62
1.6 paf 1: /** @file
2: Parser: cookie class.
3:
1.56 paf 4: Copyright(c) 2001-2003 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:
1.62 ! paf 8: static const char * const IDENT_VCOOKIE_C="$Date: 2004/02/02 09:49:19 $";
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"
16:
17: // defines
18:
19: #define PATH_NAME "path"
20: #define PATH_VALUE_DEFAULT "/"
1.1 paf 21:
22: #define SESSION_NAME "session"
23: #define DEFAULT_EXPIRES_DAYS 90
1.9 paf 24:
1.56 paf 25: // statics
26:
27: static const String path_name(PATH_NAME);
28: static const String path_value_default(PATH_VALUE_DEFAULT);
29:
1.1 paf 30: // VCookie
31:
1.56 paf 32: Value* VCookie::get_element(const String& aname, Value& /*aself*/, bool /*looking_up*/) {
1.28 parser 33: // $CLASS
1.46 paf 34: if(aname==CLASS_NAME)
1.28 parser 35: return this;
36:
1.1 paf 37: // $cookie
1.46 paf 38: if(deleted.get(aname)) // deleted?
1.1 paf 39: return 0;
40:
1.56 paf 41: if(Value* after_meaning=after.get(aname)) // assigned 'after'?
42: if(HashStringValue *hash=after_meaning->get_hash())
43: return hash->get(value_name);
1.2 paf 44: else
45: return after_meaning;
1.1 paf 46:
47: // neither deleted nor assigned
48: // return any value it had 'before'
1.56 paf 49: return before.get(aname);
1.1 paf 50: }
51:
1.56 paf 52: bool VCookie::put_element(const String& aname, Value* avalue, bool /*replace*/) {
1.1 paf 53: // $cookie
54: bool remove;
1.56 paf 55: Value* lvalue;
56: if(HashStringValue *hash=avalue->get_hash())
57: lvalue=hash->get(value_name);
1.1 paf 58: else
1.50 paf 59: lvalue=avalue;
1.51 paf 60:
61: if(lvalue && lvalue->is_string()) {
62: // taint string being assigned
1.56 paf 63: String& tainted=*new String;
64: tainted.append(*lvalue->get_string(), String::L_TAINTED, true /*forced*/);
65: lvalue=new VString(tainted);
1.51 paf 66: }
1.1 paf 67:
1.50 paf 68: remove=!lvalue || lvalue->as_string().is_empty();
69:
1.54 paf 70: (remove?deleted:after).put(aname, avalue);
1.46 paf 71: (remove?after:deleted).put(aname, 0);
72:
73: return true;
1.1 paf 74: }
75:
1.26 parser 76: static char *search_stop(char*& current, char cstop_at) {
1.37 paf 77: // sanity check
78: if(!current)
79: return 0;
80:
1.26 parser 81: // skip leading WS
82: while(*current==' ' || *current=='\t')
83: current++;
84: if(!*current)
85: return current=0;
86:
87: char *result=current;
88: if(char *pstop_at=strchr(current, cstop_at)) {
89: *pstop_at=0;
90: current=pstop_at+1;
91: } else
92: current=0;
93: return result;
94: }
95:
96:
1.6 paf 97: //#include <stdio.h>
1.56 paf 98: void VCookie::fill_fields(Request_info& request_info) {
99: //request_info.cookie="test-session=value%3D5; test-default1=value%3D1; test-default2=value%3D2; test-tomorrow=value%3D3";
100: //request_info.cookie="enabled=yes; auth.uid=196325308053599810; enabled=yes; msnames; msuri"; // mdm
101: if(!request_info.cookie)
1.1 paf 102: return;
103: /*
104: FILE *f=fopen("c:\\temp\\a", "wt");
1.56 paf 105: fprintf(f, "cookie=%s", request_info.cookie);
1.1 paf 106: fclose(f);*/
1.56 paf 107: char *cookies=strdup(request_info.cookie);
108: char *current=cookies;
1.26 parser 109: //_asm int 3;
1.56 paf 110: do {
1.26 parser 111: if(char *attribute=search_stop(current, '='))
1.38 paf 112: if(char *meaning=search_stop(current, ';')) {
1.56 paf 113: const String& sattribute=
114: *new String(unescape_chars(attribute, strlen(attribute)), 0, true);
115: const String& smeaning=
116: *new String(unescape_chars(meaning, strlen(meaning)), 0, true);
117: before.put(sattribute, new VString(smeaning));
1.38 paf 118: }
1.1 paf 119: } while(current);
120: }
121:
1.56 paf 122: static Value& expires_vdate(double days_till_expire) {
1.1 paf 123: time_t when=time(NULL)+(time_t)(60*60*24*days_till_expire);
124: struct tm *tms=gmtime(&when);
1.41 paf 125: if(!tms)
1.43 paf 126: throw Exception(0,
1.56 paf 127: 0,
1.62 ! paf 128: "bad expires time (seconds from epoch=%u)", when);
1.49 paf 129:
1.56 paf 130: return *new VDate(when);
1.1 paf 131: }
132:
1.25 parser 133: /*
1.49 paf 134: @todo
135: http://www.netscape.com/newsref/std/cookie_spec.html
1.25 parser 136: When sending cookies to a server,
137: all cookies with a more specific path mapping should be sent before cookies
138: with less specific path mappings.
139: For example, a cookie "name1=foo" with a path mapping of "/" should be sent after
140: a cookie "name1=foo2" with a path mapping of "/bar" if they are both to be sent.
141:
142: There are limitations on the number of cookies that a client can store at any one time.
143: This is a specification of the minimum number of cookies that a client should be prepared
144: to receive and store.
145: 300 total cookies
146: 4 kilobytes per cookie, where the name and the OPAQUE_STRING combine
147: to form the 4 kilobyte limit.
148: 20 cookies per server or domain. (note that completely specified hosts
149: and domains are treated as separate entities and have a 20 cookie limitation
150: for each, not combined)
151: */
1.61 paf 152: static void output_set_cookie_header(
1.56 paf 153: HashStringValue::key_type aattribute,
154: HashStringValue::value_type ameaning,
1.61 paf 155: bool adelete,
1.56 paf 156: SAPI_Info& sapi_info) {
157: String string;
1.1 paf 158: // attribute
1.56 paf 159: string.append(String(aattribute, String::L_TAINTED), String::L_HTTP_HEADER, true);
1.1 paf 160: // attribute=
1.19 paf 161: string << "=";
1.56 paf 162: Value* lmeaning;
1.1 paf 163: // figure out 'meaning'
1.61 paf 164: // Set-Cookie: (attribute)=(value); path=/
165: HashStringValue *hash;
166: double default_expires_days=adelete?-DEFAULT_EXPIRES_DAYS:+DEFAULT_EXPIRES_DAYS;
167: if((hash=ameaning->get_hash())) { // ...[hash value]
168: // clone to safely change it
169: lmeaning=new VHash(*hash); hash=lmeaning->get_hash();
170: // $expires
171: if(Value* expires=hash->get(expires_name)) {
172: const String* string;
173: if(expires->is_string() && (string=expires->get_string()) && (*string==SESSION_NAME)) {
174: // $expires[session]
175: hash->remove(expires_name);
176: } else {
177: if(Value* vdate=expires->as(VDATE_TYPE, false))
178: hash->put(expires_name, vdate); // $expires[DATE]
179: else if(double days_till_expire=expires->as_double())
180: hash->put(expires_name, &expires_vdate(days_till_expire)); // $expires(days)
181: else
182: hash->remove(expires_name); // $expires(0)
183: }
184: } else // $expires not assigned, defaulting
185: hash->put(expires_name, &expires_vdate(default_expires_days));
186: } else { // ...[string value]
187: Value* wrap_meaning=new VHash;
188: hash=wrap_meaning->get_hash();
189: // wrapping lmeaning into hash
190: hash->put(value_name, ameaning);
191: // string = $expires not assigned, defaulting
192: hash->put(expires_name, &expires_vdate(default_expires_days));
193: // replacing lmeaning with hash-wrapped one
194: lmeaning=wrap_meaning;
195: }
196:
197: if(adelete) {// removing value
1.25 parser 198: /*
199: http://www.netscape.com/newsref/std/cookie_spec.html
200: to delete a cookie, it can do so by returning a cookie with the same name,
201: and an expires time which is in the past
202: */
203:
1.1 paf 204: // Set-Cookie: (attribute)=; path=/
1.61 paf 205: lmeaning->get_hash()->remove(value_name);
1.1 paf 206: }
207: // defaulting path
1.56 paf 208: if(!lmeaning->get_hash()->get(path_name))
209: lmeaning->get_hash()->put(path_name,
210: new VString(path_value_default));
1.1 paf 211:
1.56 paf 212: // append lmeaning
213: string << attributed_meaning_to_string(*lmeaning, String::L_HTTP_HEADER, true);
1.1 paf 214:
215: // output
1.56 paf 216: SAPI::add_header_attribute(sapi_info, "set-cookie", string.cstr(String::L_UNSPECIFIED));
1.1 paf 217: }
1.56 paf 218: static void output_after(
219: HashStringValue::key_type aattribute,
220: HashStringValue::value_type ameaning,
221: SAPI_Info* sapi_info) {
1.61 paf 222: output_set_cookie_header(aattribute, ameaning, false, *sapi_info);
1.56 paf 223: }
224: static void output_deleted(
225: HashStringValue::key_type aattribute,
226: HashStringValue::value_type ameaning,
227: SAPI_Info* sapi_info) {
228: if(ameaning)
1.61 paf 229: output_set_cookie_header(aattribute, ameaning, true, *sapi_info);
1.56 paf 230: }
231: void VCookie::output_result(SAPI_Info& sapi_info) {
232: after.for_each(output_after, &sapi_info);
233: deleted.for_each(output_deleted, &sapi_info);
1.1 paf 234: }
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