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authorMichael Krelin <hacker@klever.net>2005-05-09 11:00:28 (UTC)
committer Michael Krelin <hacker@klever.net>2005-05-09 11:00:28 (UTC)
commit43d47575878e4eaf3c8da84bf609fcd0bde595fb (patch) (unidiff)
treef7ec4d1f0d0a01b43feb5c9b4f414e870036522c
parentd9578a5ae0ac4e44ff5e3c13d3f39f400f51bcf2 (diff)
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1. http headers container added
2. preliminary cookies support 3. absolutely useless http_quoted_string and http_quote utility functions added
Diffstat (more/less context) (ignore whitespace changes)
-rw-r--r--include/Makefile.am4
-rw-r--r--include/kingate/cgi_gateway.h5
-rw-r--r--include/kingate/cookies.h300
-rw-r--r--include/kingate/headers.h94
-rw-r--r--include/kingate/util.h13
-rw-r--r--src/Makefile.am4
-rw-r--r--src/cgi_gateway.cc4
-rw-r--r--src/cookies.cc242
-rw-r--r--src/headers.cc40
-rw-r--r--src/util.cc53
10 files changed, 757 insertions, 2 deletions
diff --git a/include/Makefile.am b/include/Makefile.am
index e0b778b..ee5cd51 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -4,4 +4,6 @@ nobase_include_HEADERS = \
4 kingate/fastcgi.h \ 4 kingate/fastcgi.h \
5 kingate/exception.h \ 5 kingate/exception.h \
6 kingate/util.h \ 6 kingate/util.h \
7 kingate/plaincgi.h 7 kingate/plaincgi.h \
8 kingate/cookies.h \
9 kingate/headers.h
diff --git a/include/kingate/cgi_gateway.h b/include/kingate/cgi_gateway.h
index a5c4056..f20d72b 100644
--- a/include/kingate/cgi_gateway.h
+++ b/include/kingate/cgi_gateway.h
@@ -3,6 +3,7 @@
3 3
4#include <map> 4#include <map>
5#include "kingate/cgi_interface.h" 5#include "kingate/cgi_interface.h"
6#include "kingate/cookies.h"
6 7
7#ifndef __deprecated 8#ifndef __deprecated
8#if ( __GNUC__ == 3 && __GNUC_MINOR__ > 0 ) || __GNUC__ > 3 9#if ( __GNUC__ == 3 && __GNUC_MINOR__ > 0 ) || __GNUC__ > 3
@@ -42,6 +43,10 @@ namespace kingate {
42 */ 43 */
43 params_t post; 44 params_t post;
44 /** 45 /**
46 * Cookies passed.
47 */
48 cookies_t cookies;
49 /**
45 * Was the stdin content parsed? 50 * Was the stdin content parsed?
46 */ 51 */
47 bool b_parsed_content; 52 bool b_parsed_content;
diff --git a/include/kingate/cookies.h b/include/kingate/cookies.h
new file mode 100644
index 0000000..83ef0c6
--- a/dev/null
+++ b/include/kingate/cookies.h
@@ -0,0 +1,300 @@
1#ifndef __KINGATE_COOKIES_H
2#define __KINGATE_COOKIES_H
3
4#include <string>
5#include <map>
6#include <ostream>
7
8/**
9 * @file
10 * @brief cookies-related classes.
11 */
12
13namespace kingate {
14 using namespace std;
15
16 /**
17 * Class, holding the cookie with parameters.
18 */
19 class cookie : public map<string,string> {
20 public:
21 /**
22 * Cookie name.
23 */
24 string name;
25 /**
26 * Cookie value.
27 */
28 string value;
29
30 cookie() { }
31 /**
32 * @param n cookie name.
33 * @param v cookie value.
34 */
35 cookie(const string& n,const string& v)
36 : name(n), value(v) { }
37
38 /**
39 * set cookie parameter.
40 * @param p parameter name.
41 * @param v parameter value.
42 * @see _get_string()
43 */
44 void _set_string(const string& p,const string& v);
45
46 /**
47 * @param n cookie name.
48 * @see get_name()
49 */
50 void set_name(const string& n) { name = n; }
51 /**
52 * @param v cookie value.
53 * @see set_value()
54 */
55 void set_value(const string& v) { value = v; }
56 /**
57 * @param c coomment.
58 * @see get_comment()
59 * @see has_comment()
60 * @see unset_comment()
61 */
62 void set_comment(const string& c);
63 /**
64 * @param d domain.
65 * @see get_domain()
66 * @see has_domain()
67 * @see unset_domain()
68 */
69 void set_domain(const string& d);
70 /**
71 * @param ma max-age.
72 * @see get_max_age()
73 * @see has_max_age()
74 * @see unset_max_age()
75 */
76 void set_max_age(const string& ma);
77 /**
78 * @param p path.
79 * @see get_path()
80 * @see has_path()
81 * @see unset_path()
82 */
83 void set_path(const string& p);
84 /**
85 * set cookie security.
86 * @param s true if secure.
87 * @see get_secure()
88 * @see is_secure()
89 */
90 void set_secure(bool s);
91
92 /**
93 * @param e expiration time.
94 * @see get_expires()
95 * @see has_expires()
96 * @see unset_expires()
97 */
98 void set_expires(const string& e);
99
100 /**
101 * get cookie parameter.
102 * @param p parameter name.
103 * @return parameter value.
104 * @see _set_string()
105 */
106 const string& _get_string(const string& p) const;
107
108 /**
109 * @return cookie name.
110 * @see set_name()
111 */
112 const string& get_name() const { return name; }
113 /**
114 * @return cookie value.
115 * @see set_value()
116 */
117 const string& get_value() const { return value; }
118 /**
119 * @return cookie comment.
120 * @see set_comment()
121 * @see has_comment()
122 * @see unset_comment()
123 */
124 const string& get_comment() const;
125 /**
126 * @return cookie domain.
127 * @see set_domain()
128 * @see has_domain()
129 * @see unset_domain()
130 */
131 const string& get_domain() const;
132 /**
133 * @return cookie max-age.
134 * @see set_max_age()
135 * @see has_max_age()
136 * @see unset_max_age()
137 */
138 const string& get_max_age() const;
139 /**
140 * @return cookie path.
141 * @see set_path()
142 * @see has_path()
143 * @see unset_path()
144 */
145 const string& get_path() const;
146 /**
147 * @return cookie security.
148 * @see is_secure()
149 * @see set_secure()
150 */
151 bool get_secure() const;
152 /**
153 * @return cookie security.
154 * @see get_secure()
155 * @see set_secure()
156 */
157 bool is_secure() const { return get_secure(); }
158
159 /**
160 * @return cookie expiration time.
161 * @see set_expires()
162 * @see has_expires()
163 * @see unset_expires()
164 */
165 const string& get_expires() const;
166
167 /**
168 * @return true if cookie has comment.
169 * @see set_comment()
170 * @see get_comment()
171 * @see unset_comment()
172 */
173 bool has_comment() const;
174 /**
175 * @return true if cookie has domain.
176 * @see set_domain()
177 * @see get_domain()
178 * @see unset_domain()
179 */
180 bool has_domain() const;
181 /**
182 * @return true if cookie has max-age.
183 * @see set_max_age()
184 * @see get_max_age()
185 * @see unset_max_age()
186 */
187 bool has_max_age() const;
188 /**
189 * @return true if cookie has path.
190 * @see set_path()
191 * @see get_path()
192 * @see unset_path()
193 */
194 bool has_path() const;
195
196 /**
197 * @return true if cookie has expiration time.
198 * @see set_expires()
199 * @see get_expires()
200 * @see unset_expires()
201 */
202 bool has_expires() const;
203
204 /**
205 * rid cookie of comment.
206 * @see set_comment()
207 * @see get_comment()
208 * @see has_comment()
209 */
210 void unset_comment();
211 /**
212 * rid cookie of domain.
213 * @see set_domain()
214 * @see get_domain()
215 * @see has_domain()
216 */
217 void unset_domain();
218 /**
219 * rid cookie of max-age.
220 * @see set_max_age()
221 * @see get_max_age()
222 * @see has_max_age()
223 */
224 void unset_max_age();
225 /**
226 * rid cookie of path.
227 * @see set_path()
228 * @see get_path()
229 * @see has_path()
230 */
231 void unset_path();
232
233 /**
234 * rid cookie of expiration time.
235 * @see set_expires()
236 * @see get_expires()
237 * @see has_expires()
238 */
239 void unset_expires();
240
241 /**
242 * render the 'Set-Cookie' HTTP header according to RFC2109.
243 * Absolutely useless, only works with lynx.
244 * @return the rendered header content.
245 */
246 string set_cookie_header_rfc2109() const;
247 /**
248 * render the 'Set-Cookie' header according to the early vague
249 * netscape specs and common practice.
250 * @return the rendered header content.
251 */
252 string set_cookie_header() const;
253 };
254
255 /**
256 * Cookies container class.
257 */
258 class cookies_t : public map<string,cookie> {
259 public:
260
261 cookies_t() { }
262 /**
263 * @param s 'Cookie:' HTTP header contents to parse.
264 */
265 cookies_t(const string& s) { parse_cookies(s); }
266
267 /**
268 * @param c cookie to set.
269 */
270 void set_cookie(const cookie& c) { (*this)[c.get_name()]=c; }
271 /**
272 * @param n cookie name to remove.
273 */
274 void unset_cookie(const key_type& n) { erase(n); }
275 /**
276 * @param n cookie name.
277 * @return true if exists.
278 */
279 bool has_cookie(const key_type& n) const;
280 /**
281 * Return the named cookie if one exists.
282 * @param n cookie name.
283 * @return const reference to cookie object.
284 */
285 const cookie& get_cookie(const key_type& n) const;
286 /**
287 * Return the named cookie if one exists.
288 * @param n cookie name.
289 * @return reference to cookie object.
290 */
291 cookie& get_cookie(const key_type& n);
292
293 /**
294 * @param s HTTP 'Cookie' header content.
295 */
296 void parse_cookies(const string& s);
297 };
298}
299
300#endif /* __KINGATE_COOKIES_H */
diff --git a/include/kingate/headers.h b/include/kingate/headers.h
new file mode 100644
index 0000000..fb37fec
--- a/dev/null
+++ b/include/kingate/headers.h
@@ -0,0 +1,94 @@
1#ifndef __KINGATE_HEADERS_H
2#define __KINGATE_HEADERS_H
3
4#include <string>
5#include <map>
6#include <ostream>
7
8/**
9 * @file
10 * @brief the headers -- HTTP headers container class.
11 */
12
13namespace kingate {
14 using namespace std;
15
16 /**
17 * The container class for HTTP headers.
18 */
19 class headers : public multimap<string,string> {
20 public:
21
22 /**
23 * Reference header if one exists.
24 * @param k the header.
25 * @return reference to the content.
26 */
27 const mapped_type& operator[](const key_type& k) const {
28 return get_header(k);
29 }
30 /**
31 * Reference header, creating one if needed.
32 * @param k the header.
33 * @return reference to the content.
34 */
35 mapped_type& operator[](const key_type& k) {
36 return get_header(k);
37 }
38
39 /**
40 * Set HTTP header. Remove all existent occurences of headers with
41 * this name.
42 * @param h header name.
43 * @param c header content.
44 */
45 void set_header(const key_type& h,const mapped_type& c);
46 /**
47 * Add HTTP header.
48 * @param h header name.
49 * @param c header content.
50 */
51 void add_header(const key_type& h,const mapped_type& c);
52 /**
53 * Remove named header.
54 * @param h header name.
55 */
56 void unset_header(const key_type& h);
57 /**
58 * Return const reference to the existing header.
59 * @param h header name.
60 * @return reference to header content.
61 */
62 const mapped_type& get_header(const key_type& h) const;
63 /**
64 * Return reference to the header, creating one if needed.
65 * @param h header name.
66 * @return reference to the content.
67 */
68 mapped_type& get_header(const key_type& h);
69 /**
70 * Return the range of headers with a certain name.
71 * @param h header name.
72 * @return pair of const iterators with the beginning and the end
73 * of range.
74 */
75 pair<const_iterator,const_iterator> get_headers(const key_type& h) const;
76 /**
77 * Return the range of headers with a certain name.
78 * @param h header name.
79 * @return pair of iterators with the beginning and the end
80 * of range.
81 */
82 pair<iterator,iterator> get_headers(const key_type& h);
83 /**
84 * Inquire whether the named header exists.
85 * @param h header name.
86 * @return true if exists.
87 */
88 bool has_header(const key_type& h) const;
89
90 };
91
92}
93
94#endif /* __KINGATE_HEADERS_H */
diff --git a/include/kingate/util.h b/include/kingate/util.h
index 6024ccf..3fd96f6 100644
--- a/include/kingate/util.h
+++ b/include/kingate/util.h
@@ -28,6 +28,19 @@ namespace kingate {
28 string url_decode(const string& str); 28 string url_decode(const string& str);
29 29
30 /** 30 /**
31 * Quote string for use in HTTP header.
32 * @param str the string to quote.
33 * @return the quoted string.
34 */
35 string http_quoted_string(const string& str);
36 /**
37 * Quote string for use in HTTP header if necessary.
38 * @param str the string to quote.
39 * @return the quoted string or token left as is.
40 */
41 string http_quote(const string& str);
42
43 /**
31 * deprecated alias to url_encode. 44 * deprecated alias to url_encode.
32 * @see url_encode 45 * @see url_encode
33 */ 46 */
diff --git a/src/Makefile.am b/src/Makefile.am
index 12bb1f8..2d462c8 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -11,7 +11,9 @@ LDADD = ${KONFORKA_LIBS}
11libkingate_la_SOURCES = \ 11libkingate_la_SOURCES = \
12 cgi_gateway.cc \ 12 cgi_gateway.cc \
13 cgi_interface.cc \ 13 cgi_interface.cc \
14 util.cc 14 util.cc \
15 cookies.cc \
16 headers.cc
15libkingate_la_LDFLAGS = -version-info 2:0:0 17libkingate_la_LDFLAGS = -version-info 2:0:0
16 18
17libkingate_fcgi_la_SOURCES = \ 19libkingate_fcgi_la_SOURCES = \
diff --git a/src/cgi_gateway.cc b/src/cgi_gateway.cc
index 30410f2..ab48f78 100644
--- a/src/cgi_gateway.cc
+++ b/src/cgi_gateway.cc
@@ -27,6 +27,10 @@ namespace kingate {
27 } 27 }
28 b_parsed_content = true; 28 b_parsed_content = true;
29 } 29 }
30 // Parse cookies
31 try {
32 cookies.parse_cookies(get_meta("HTTP_COOKIE"));
33 }catch(exception_notfound& enf) { }
30 } 34 }
31 35
32 bool cgi_gateway::has_GET(const string& n) const { 36 bool cgi_gateway::has_GET(const string& n) const {
diff --git a/src/cookies.cc b/src/cookies.cc
new file mode 100644
index 0000000..40a0c8b
--- a/dev/null
+++ b/src/cookies.cc
@@ -0,0 +1,242 @@
1#include "kingate/cookies.h"
2#include "kingate/util.h"
3#include "kingate/exception.h"
4
5namespace kingate {
6
7 /*
8 * RFC 2109:
9 * av-pairs = av-pair *(";" av-pair)
10 * av-pair = attr ["=" value] ; optional value
11 * attr = token
12 * value = word
13 * word = token | quoted-string
14 */
15
16 /* RFC 2109:
17 *
18 * The origin server effectively ends a session by sending the client a
19 * Set-Cookie header with Max-Age=0.
20 *
21 * An origin server may include multiple Set-Cookie headers in a response.
22 * Note that an intervening gateway could fold multiple such headers into a
23 * single header.
24 *
25 *
26 * set-cookie = "Set-Cookie:" cookies
27 * cookies = 1#cookie
28 * cookie = NAME "=" VALUE *(";" cookie-av)
29 * NAME = attr
30 * VALUE = value
31 * cookie-av = "Comment" "=" value
32 * | "Domain" "=" value
33 * | "Max-Age" "=" value
34 * | "Path" "=" value
35 * | "Secure"
36 * | "Version" "=" 1*DIGIT
37 *
38 *
39 * The origin server should send the following additional HTTP/1.1
40 * response headers, depending on circumstances:
41 *
42 * * To suppress caching of the Set-Cookie header: Cache-control: no-
43 * cache="set-cookie".
44 *
45 * and one of the following:
46 *
47 * * To suppress caching of a private document in shared caches: Cache-
48 * control: private.
49 *
50 * * To allow caching of a document and require that it be validated
51 * before returning it to the client: Cache-control: must-revalidate.
52 *
53 * * To allow caching of a document, but to require that proxy caches
54 * (not user agent caches) validate it before returning it to the
55 * client: Cache-control: proxy-revalidate.
56 *
57 * * To allow caching of a document and request that it be validated
58 * before returning it to the client (by "pre-expiring" it):
59 * Cache-control: max-age=0. Not all caches will revalidate the
60 * document in every case.
61 *
62 * HTTP/1.1 servers must send Expires: old-date (where old-date is a
63 * date long in the past) on responses containing Set-Cookie response
64 * headers unless they know for certain (by out of band means) that
65 * there are no downsteam HTTP/1.0 proxies. HTTP/1.1 servers may send
66 * other Cache-Control directives that permit caching by HTTP/1.1
67 * proxies in addition to the Expires: old-date directive; the Cache-
68 * Control directive will override the Expires: old-date for HTTP/1.1
69 * proxies.
70 *
71 */
72
73 void cookie::_set_string(const string& p,const string& v) {
74 (*this)[p]=v;
75 }
76
77 void cookie::set_comment(const string& c) {
78 _set_string("comment",c);
79 }
80 void cookie::set_domain(const string& d) {
81 _set_string("domain",d);
82 }
83 void cookie::set_max_age(const string& ma) {
84 _set_string("max-age",ma);
85 }
86 void cookie::set_path(const string& p) {
87 _set_string("path",p);
88 }
89 void cookie::set_secure(bool s) {
90 if(s)
91 _set_string("secure","");
92 else
93 erase("secure");
94 }
95
96 void cookie::set_expires(const string& e) {
97 (*this)["expires"] = e;
98 }
99
100 const string& cookie::_get_string(const string& s) const {
101 const_iterator i = find(s);
102 if(i==end())
103 throw exception_notfound(CODEPOINT,"No parameter set");
104 return i->second;
105 }
106
107 const string& cookie::get_comment() const {
108 return _get_string("comment");
109 }
110 const string& cookie::get_domain() const {
111 return _get_string("domain");
112 }
113 const string& cookie::get_max_age() const {
114 return _get_string("max-age");
115 }
116 const string& cookie::get_path() const {
117 return _get_string("path");
118 }
119 bool cookie::get_secure() const {
120 return find("secure")!=end();
121 }
122
123 const string& cookie::get_expires() const {
124 return _get_string("expires");
125 }
126
127 bool cookie::has_comment() const {
128 return find("comment")!=end();
129 }
130 bool cookie::has_domain() const {
131 return find("domain")!=end();
132 }
133 bool cookie::has_max_age() const {
134 return find("max-age")!=end();
135 }
136 bool cookie::has_path() const {
137 return find("path")!=end();
138 }
139
140 bool cookie::has_expires() const {
141 return find("expires")!=end();
142 }
143
144 void cookie::unset_comment() {
145 erase("comment");
146 }
147 void cookie::unset_domain() {
148 erase("domain");
149 }
150 void cookie::unset_max_age() {
151 erase("max-age");
152 }
153 void cookie::unset_path() {
154 erase("path");
155 }
156
157 void cookie::unset_expires() {
158 erase("expires");
159 }
160
161 string cookie::set_cookie_header_rfc2109() const {
162 string rv = name + "=" + http_quoted_string(value);
163 for(const_iterator i=begin();i!=end();++i) {
164 if(i->first=="secure") {
165 rv += "; secure";
166 }else{
167 rv += "; "+i->first+"="+http_quote(i->second);
168 }
169 }
170 rv += "; Version=1";
171 return rv;
172 }
173
174 string cookie::set_cookie_header() const {
175 string rv = name + "=" + value;
176 for(const_iterator i=begin();i!=end();++i) {
177 if(i->first=="secure") {
178 rv += "; secure";
179 }else{
180 rv += "; "+i->first+"="+i->second;
181 }
182 }
183 return rv;
184 }
185
186 bool cookies_t::has_cookie(const key_type& n) const {
187 return find(n)!=end();
188 }
189
190 const cookie& cookies_t::get_cookie(const key_type& n) const {
191 const_iterator i=find(n);
192 if(i==end())
193 throw exception_notfound(CODEPOINT,"No cookie with such name found");
194 return i->second;
195 }
196
197 cookie& cookies_t::get_cookie(const key_type& n) {
198 iterator i=find(n);
199 if(i==end())
200 throw exception_notfound(CODEPOINT,"No cookie with such name found");
201 return i->second;
202 }
203
204 void cookies_t::parse_cookies(const string& s) {
205 string str = s;
206 while(!str.empty()) {
207 string::size_type sc = str.find(';');
208 string s;
209 if(sc==string::npos) {
210 s = str;
211 str.erase();
212 }else{
213 s = str.substr(0,sc);
214 str.erase(0,sc+1);
215 }
216 string::size_type nsp=s.find_first_not_of(" \t");
217 if((nsp!=string::npos) && nsp)
218 s.erase(0,nsp);
219 string::size_type eq=s.find('=');
220 if(eq==string::npos)
221 continue;
222 string n = s.substr(0,eq);
223 s.erase(0,eq+1);
224 nsp = n.find_last_not_of(" \t");
225 n.erase(nsp+1);
226 nsp = s.find_first_not_of(" \t");
227 string v;
228 if(nsp!=string::npos)
229 v = s.substr(nsp);
230 else
231 v = s;
232 nsp = v.find_last_not_of(" \t");
233 if(nsp==string::npos)
234 v.erase();
235 else
236 v.erase(nsp+1);
237 cookie& c = (*this)[n];
238 c.set_name(n); c.set_value(v);
239 }
240 }
241
242}
diff --git a/src/headers.cc b/src/headers.cc
new file mode 100644
index 0000000..89ac519
--- a/dev/null
+++ b/src/headers.cc
@@ -0,0 +1,40 @@
1#include "kingate/headers.h"
2#include "kingate/exception.h"
3
4namespace kingate {
5
6 void headers::set_header(const key_type& h,const mapped_type& c) {
7 erase(h);
8 insert(value_type(h,c));
9 }
10 void headers::add_header(const key_type& h,const mapped_type& c) {
11 insert(value_type(h,c));
12 }
13 void headers::unset_header(const key_type& h) {
14 erase(h);
15 }
16 const headers::mapped_type& headers::get_header(const key_type& h) const {
17 const_iterator i=find(h);
18 if(i==end())
19 throw exception_notfound(CODEPOINT,"No such header");
20 return i->second;
21 }
22 headers::mapped_type& headers::get_header(const key_type& h) {
23 // XXX: or should it fail if there's no such thing, unlike operator[]?
24 iterator i=find(h);
25 if(i==end())
26 i = insert(value_type(h,""));
27 return i->second;
28 }
29
30 pair<headers::const_iterator,headers::const_iterator> headers::get_headers(const key_type& h) const {
31 return equal_range(h);
32 }
33 pair<headers::iterator,headers::iterator> headers::get_headers(const key_type& h) {
34 return equal_range(h);
35 }
36
37 bool headers::has_header(const key_type& h) const {
38 return find(h)!=end();
39 }
40}
diff --git a/src/util.cc b/src/util.cc
index 3166e62..48e486a 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -50,4 +50,57 @@ namespace kingate {
50 } 50 }
51 return rv; 51 return rv;
52 } 52 }
53
54 /*
55 * RFC 2616:
56 *
57 * separators = "(" | ")" | "<" | ">" | "@"
58 * | "," | ";" | ":" | "\" | <">
59 * | "/" | "[" | "]" | "?" | "="
60 * | "{" | "}" | SP | HT
61 */
62
63 /*
64 * RFC 2616:
65 *
66 * token = 1*<any CHAR except CTLs or separators>
67 */
68
69 static const char *quotible_chars =
70 "\001\002\003\004\005\006\007\010"
71 "\011\012\013\014\015\016\017\020"
72 "\021\022\023\024\025\026\027\030"
73 "\031\032\033\034\035\036\037\040"
74 "()<>@,;:\\\"/[]?={}" /* separator chars (except for SP and HT mentioned elsewhere */
75 "\177"
76 ;
77
78 /*
79 * RFC 2616:
80 *
81 * quoted-string = ( <"> *(qdtext | quoted-pair ) <"> )
82 * qdtext = <any TEXT except <">>
83 *
84 * The backslash character ("\") MAY be used as a single-character
85 * quoting mechanism only within quoted-string and comment constructs.
86 *
87 * quoted-pair = "\" CHAR
88 */
89
90 string http_quoted_string(const string& str) {
91 string rv = str;
92 string::size_type sp=0;
93 for(string::size_type q=rv.find('"');(q=rv.find('"',q))!=string::npos;q+=2)
94 rv.insert(q,1,'\\');
95 rv.insert(0,1,'"');
96 rv += '"';
97 return rv;
98 }
99
100 string http_quote(const string& str) {
101 if(str.find_first_of(quotible_chars)==string::npos)
102 return str;
103 return http_quoted_string(str);
104 }
105
53} 106}