1. http headers container added

2. preliminary cookies support
3. absolutely useless http_quoted_string and http_quote utility functions added

1 files changed, 242 insertions, 0 deletions

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 @@
+#include "kingate/cookies.h"
+#include "kingate/util.h"
+#include "kingate/exception.h"
+
+namespace kingate {
+
+    /*
+     * RFC 2109:
+     *    av-pairs        =       av-pair *(";" av-pair)
+     *    av-pair         =       attr ["=" value]        ; optional value
+     *    attr            =       token
+     *    value           =       word
+     *    word            =       token | quoted-string
+     */
+
+    /* RFC 2109:
+     *
+     * The origin server effectively ends a session by sending the client a
+     * Set-Cookie header with Max-Age=0.
+     *
+     * An origin server may include multiple Set-Cookie headers in a response.
+     * Note that an intervening gateway could fold multiple such headers into a
+     * single header.
+     *
+     *
+     *    set-cookie      =       "Set-Cookie:" cookies
+     *    cookies         =       1#cookie
+     *    cookie          =       NAME "=" VALUE *(";" cookie-av)
+     *    NAME            =       attr
+     *    VALUE           =       value
+     *    cookie-av       =       "Comment" "=" value
+     *                    |       "Domain" "=" value
+     *                    |       "Max-Age" "=" value
+     *                    |       "Path" "=" value
+     *                    |       "Secure"
+     *                    |       "Version" "=" 1*DIGIT
+     *
+     *
+     *    The origin server should send the following additional HTTP/1.1
+     *    response headers, depending on circumstances:
+     *
+     *    * To suppress caching of the Set-Cookie header: Cache-control: no-
+     *      cache="set-cookie".
+     *
+     *    and one of the following:
+     *
+     *    * To suppress caching of a private document in shared caches: Cache-
+     *      control: private.
+     *
+     *    * To allow caching of a document and require that it be validated
+     *      before returning it to the client: Cache-control: must-revalidate.
+     *
+     *    * To allow caching of a document, but to require that proxy caches
+     *      (not user agent caches) validate it before returning it to the
+     *      client: Cache-control: proxy-revalidate.
+     *
+     *    * To allow caching of a document and request that it be validated
+     *      before returning it to the client (by "pre-expiring" it):
+     *      Cache-control: max-age=0.  Not all caches will revalidate the
+     *      document in every case.
+     *
+     *    HTTP/1.1 servers must send Expires: old-date (where old-date is a
+     *    date long in the past) on responses containing Set-Cookie response
+     *    headers unless they know for certain (by out of band means) that
+     *    there are no downsteam HTTP/1.0 proxies.  HTTP/1.1 servers may send
+     *    other Cache-Control directives that permit caching by HTTP/1.1
+     *    proxies in addition to the Expires: old-date directive; the Cache-
+     *    Control directive will override the Expires: old-date for HTTP/1.1
+     *    proxies.
+     *
+     */
+
+    void cookie::_set_string(const string& p,const string& v) {
+        (*this)[p]=v;
+    }
+
+    void cookie::set_comment(const string& c) {
+        _set_string("comment",c);
+    }
+    void cookie::set_domain(const string& d) {
+        _set_string("domain",d);
+    }
+    void cookie::set_max_age(const string& ma) {
+        _set_string("max-age",ma);
+    }
+    void cookie::set_path(const string& p) {
+        _set_string("path",p);
+    }
+    void cookie::set_secure(bool s) {
+        if(s)
+            _set_string("secure","");
+        else
+            erase("secure");
+    }
+
+    void cookie::set_expires(const string& e) {
+        (*this)["expires"] = e;
+    }
+
+    const string& cookie::_get_string(const string& s) const {
+        const_iterator i = find(s);
+        if(i==end())
+            throw exception_notfound(CODEPOINT,"No parameter set");
+        return i->second;
+    }
+
+    const string& cookie::get_comment() const {
+        return _get_string("comment");
+    }
+    const string& cookie::get_domain() const {
+        return _get_string("domain");
+    }
+    const string& cookie::get_max_age() const {
+        return _get_string("max-age");
+    }
+    const string& cookie::get_path() const {
+        return _get_string("path");
+    }
+    bool cookie::get_secure() const {
+        return find("secure")!=end();
+    }
+
+    const string& cookie::get_expires() const {
+        return _get_string("expires");
+    }
+
+    bool cookie::has_comment() const {
+        return find("comment")!=end();
+    }
+    bool cookie::has_domain() const {
+        return find("domain")!=end();
+    }
+    bool cookie::has_max_age() const {
+        return find("max-age")!=end();
+    }
+    bool cookie::has_path() const {
+        return find("path")!=end();
+    }
+
+    bool cookie::has_expires() const {
+        return find("expires")!=end();
+    }
+
+    void cookie::unset_comment() {
+        erase("comment");
+    }
+    void cookie::unset_domain() {
+        erase("domain");
+    }
+    void cookie::unset_max_age() {
+        erase("max-age");
+    }
+    void cookie::unset_path() {
+        erase("path");
+    }
+
+    void cookie::unset_expires() {
+        erase("expires");
+    }
+
+    string cookie::set_cookie_header_rfc2109() const {
+        string rv = name + "=" + http_quoted_string(value);
+        for(const_iterator i=begin();i!=end();++i) {
+            if(i->first=="secure") {
+                rv += "; secure";
+            }else{
+                rv += "; "+i->first+"="+http_quote(i->second);
+            }
+        }
+        rv += "; Version=1";
+        return rv;
+    }
+
+    string cookie::set_cookie_header() const {
+        string rv = name + "=" + value;
+        for(const_iterator i=begin();i!=end();++i) {
+            if(i->first=="secure") {
+                rv += "; secure";
+            }else{
+                rv += "; "+i->first+"="+i->second;
+            }
+        }
+        return rv;
+    }
+
+    bool cookies_t::has_cookie(const key_type& n) const {
+        return find(n)!=end();
+    }
+
+    const cookie& cookies_t::get_cookie(const key_type& n) const {
+        const_iterator i=find(n);
+        if(i==end())
+            throw exception_notfound(CODEPOINT,"No cookie with such name found");
+        return i->second;
+    }
+
+    cookie& cookies_t::get_cookie(const key_type& n) {
+        iterator i=find(n);
+        if(i==end())
+            throw exception_notfound(CODEPOINT,"No cookie with such name found");
+        return i->second;
+    }
+
+    void cookies_t::parse_cookies(const string& s) {
+        string str = s;
+        while(!str.empty()) {
+            string::size_type sc = str.find(';');
+            string s;
+            if(sc==string::npos) {
+                s = str;
+                str.erase();
+            }else{
+                s = str.substr(0,sc);
+                str.erase(0,sc+1);
+            }
+            string::size_type nsp=s.find_first_not_of(" \t");
+            if((nsp!=string::npos) && nsp)
+                s.erase(0,nsp);
+            string::size_type eq=s.find('=');
+            if(eq==string::npos)
+                continue;
+            string n = s.substr(0,eq);
+            s.erase(0,eq+1);
+            nsp = n.find_last_not_of(" \t");
+            n.erase(nsp+1);
+            nsp = s.find_first_not_of(" \t");
+            string v;
+            if(nsp!=string::npos)
+                v = s.substr(nsp);
+            else
+                v = s;
+            nsp = v.find_last_not_of(" \t");
+            if(nsp==string::npos)
+                v.erase();
+            else
+                v.erase(nsp+1);
+            cookie& c = (*this)[n];
+            c.set_name(n); c.set_value(v);
+        }
+    }
+
+}