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#pike __REAL_VERSION__ 
 
// Informational 
constant HTTP_CONTINUE              = 100; // RFC 2616 10.1.1: Continue 
constant HTTP_SWITCH_PROT   = 101; // RFC 2616 10.1.2: Switching protocols 
constant DAV_PROCESSING             = 102; // RFC 2518 10.1: Processing 
 
// Successful 
constant HTTP_OK            = 200; // RFC 2616 10.2.1: OK 
constant HTTP_CREATED               = 201; // RFC 2616 10.2.2: Created 
constant HTTP_ACCEPTED              = 202; // RFC 2616 10.2.3: Accepted 
constant HTTP_NONAUTHORATIVE        = 203; // RFC 2616 10.2.4: Non-Authorative Information 
constant HTTP_NO_CONTENT    = 204; // RFC 2616 10.2.5: No Content 
constant HTTP_RESET_CONTENT = 205; // RFC 2616 10.2.6: Reset Content 
constant HTTP_PARTIAL_CONTENT       = 206; // RFC 2616 10.2.7: Partial Content 
constant DAV_MULTISTATUS    = 207; // RFC 2518 10.2: Multi-Status 
constant DELTA_HTTP_IM_USED = 226; // RFC 3229 10.4.1: IM Used 
 
// Redirection 
constant HTTP_MULTIPLE              = 300; // RFC 2616 10.3.1: Multiple Choices 
constant HTTP_MOVED_PERM    = 301; // RFC 2616 10.3.2: Moved Permanently 
constant HTTP_FOUND         = 302; // RFC 2616 10.3.3: Found 
constant HTTP_SEE_OTHER             = 303; // RFC 2616 10.3.4: See Other 
constant HTTP_NOT_MODIFIED  = 304; // RFC 2616 10.3.5: Not Modified 
constant HTTP_USE_PROXY             = 305; // RFC 2616 10.3.6: Use Proxy 
// RFC 2616 10.3.7: 306 not used but reserved. 
constant HTTP_TEMP_REDIRECT = 307; // RFC 2616 10.3.8: Temporary Redirect 
 
// Client errors 
constant HTTP_BAD           = 400; // RFC 2616 10.4.1: Bad Request 
constant HTTP_UNAUTH                = 401; // RFC 2616 10.4.2: Unauthorized 
constant HTTP_PAY           = 402; // RFC 2616 10.4.3: Payment Required 
constant HTTP_FORBIDDEN             = 403; // RFC 2616 10.4.4: Forbidden 
constant HTTP_NOT_FOUND             = 404; // RFC 2616 10.4.5: Not Found 
constant HTTP_METHOD_INVALID        = 405; // RFC 2616 10.4.6: Method Not Allowed 
constant HTTP_NOT_ACCEPTABLE        = 406; // RFC 2616 10.4.7: Not Acceptable 
constant HTTP_PROXY_AUTH_REQ        = 407; // RFC 2616 10.4.8: Proxy Authentication Required 
constant HTTP_TIMEOUT               = 408; // RFC 2616 10.4.9: Request Timeout 
constant HTTP_CONFLICT              = 409; // RFC 2616 10.4.10: Conflict 
constant HTTP_GONE          = 410; // RFC 2616 10.4.11: Gone 
constant HTTP_LENGTH_REQ    = 411; // RFC 2616 10.4.12: Length Required 
constant HTTP_PRECOND_FAILED        = 412; // RFC 2616 10.4.13: Precondition Failed 
constant HTTP_REQ_TOO_LARGE = 413; // RFC 2616 10.4.14: Request Entity Too Large 
constant HTTP_URI_TOO_LONG  = 414; // RFC 2616 10.4.15: Request-URI Too Long 
constant HTTP_UNSUPP_MEDIA  = 415; // RFC 2616 10.4.16: Unsupported Media Type 
constant HTTP_BAD_RANGE             = 416; // RFC 2616 10.4.17: Requested Range Not Satisfiable 
constant HTTP_EXPECT_FAILED = 417; // RFC 2616 10.4.18: Expectation Failed 
constant HTCPCP_TEAPOT              = 418; // RFC 2324 2.3.2: I'm a teapot 
constant DAV_UNPROCESSABLE  = 422; // RFC 2518 10.3: Unprocessable Entry 
constant DAV_LOCKED         = 423; // RFC 2518 10.4: Locked 
constant DAV_FAILED_DEP             = 424; // RFC 2518 10.5: Failed Dependency 
 
// Server errors 
constant HTTP_INTERNAL_ERR  = 500; // RFC 2616 10.5.1: Internal Server Error 
constant HTTP_NOT_IMPL              = 501; // RFC 2616 10.5.2: Not Implemented 
constant HTTP_BAD_GW                = 502; // RFC 2616 10.5.3: Bad Gateway 
constant HTTP_UNAVAIL               = 503; // RFC 2616 10.5.4: Service Unavailable 
constant HTTP_GW_TIMEOUT    = 504; // RFC 2616 10.5.5: Gateway Timeout 
constant HTTP_UNSUPP_VERSION        = 505; // RFC 2616 10.5.6: HTTP Version Not Supported 
constant TCN_VARIANT_NEGOTIATES     = 506; // RFC 2295 8.1: Variant Also Negotiates 
constant DAV_STORAGE_FULL   = 507; // RFC 2518 10.6: Insufficient Storage 
 
//! Makes an HTTP request through a proxy. 
.Query do_proxied_method(string|Standards.URI proxy, 
                         string user, string password, 
                         string method, 
                         string|Standards.URI url, 
                         void|mapping(string:int|string|array(string)) query_variables, 
                         void|mapping(string:string|array(string)) request_headers, 
                         void|Protocols.HTTP.Query con, void|string data) 
{ 
  if( stringp(proxy) ) 
    proxy = Standards.URI(proxy); 
  if( stringp(url) ) 
    url = Standards.URI(url); 
  if( url->scheme != "http" ) error("No can do.\n"); 
 
  if( query_variables ) 
    url->set_query_variables( url->get_query_variables() + 
                              query_variables ); 
  string web_url = (string)url; 
 
  // Note: url object is wrecked here 
  url->host = proxy->host; 
  url->port = proxy->port; 
  url->query = 0; 
  url->path = web_url; 
 
 
  if( user || password ) 
  { 
    if( !request_headers ) 
      request_headers = ([]); 
    request_headers["Proxy-Authorization"] = "Basic " 
      + MIME.encode_base64(url->user + ":" + 
                           (url->password || "")); 
  } 
 
  return do_method(method, url, 0, request_headers, con, data); 
} 
 
//! Low level HTTP call method. 
//! 
//! @param method 
//!   The HTTP method to use, e.g. @expr{"GET"@}. 
//! @param url 
//!   The URL to perform @[method] on. Should be a complete URL, 
//!   including protocol, e.g. @expr{"https://pike.lysator.liu.se/"@}. 
//! @param query_variables 
//!   Calls @[http_encode_query] and appends the result to the URL. 
//! @param request_headers 
//!   The HTTP headers to be added to the request. By default the 
//!   headers User-agent, Host and, if needed by the url, 
//!   Authorization will be added, with generated contents. 
//!   Providing these headers will override the default. Setting 
//!   the value to 0 will remove that header from the request. 
//! @param con 
//!   Old connection object. 
//! @param data 
//!   Data payload to be transmitted in the request. 
//! 
//! @seealso 
//!   @[do_sync_method()] 
.Query do_method(string method, 
                 string|Standards.URI url, 
                 void|mapping(string:int|string|array(string)) query_variables, 
                 void|mapping(string:string|array(string)) request_headers, 
                 void|Protocols.HTTP.Query con, void|string data) 
{ 
  if(stringp(url)) 
    url=Standards.URI(url); 
 
  if( (< "httpu", "httpmu" >)[url->scheme] ) { 
    return do_udp_method(method, url, query_variables, request_headers, 
                         con, data); 
  } 
 
  if(!con) 
    con = .Query(); 
 
#if constant(SSL.sslfile)      
  if(url->scheme!="http" && url->scheme!="https") 
    error("Can't handle %O or any other protocols than HTTP or HTTPS.\n", 
          url->scheme); 
 
  con->https = (url->scheme=="https")? 1 : 0; 
#else 
  if(url->scheme!="http") 
    error("Can't handle %O or any other protocol than HTTP " 
          "(HTTPS requires Nettle support).\n", 
          url->scheme); 
#endif 
 
  if(!request_headers) 
    request_headers = ([]); 
  mapping default_headers = ([ 
    "user-agent" : "Mozilla/5.0 (compatible; MSIE 6.0; Pike HTTP client)" 
    " Pike/" + __REAL_MAJOR__ + "." + __REAL_MINOR__ + "." + __REAL_BUILD__, 
    "host" : url->host +  
    (url->port!=(url->scheme=="https"?443:80)?":"+url->port:"")]); 
 
  if(url->user || url->passwd) 
    default_headers->authorization = "Basic " 
                                   + MIME.encode_base64(url->user + ":" + 
                                                        (url->password || "")); 
  request_headers = default_headers | request_headers; 
 
  string query=url->query; 
  if(query_variables && sizeof(query_variables)) 
  { 
    if(query) 
      query+="&"+http_encode_query(query_variables); 
    else 
      query=http_encode_query(query_variables); 
  } 
 
  string path=url->path; 
  if(path=="") path="/"; 
 
  con->sync_request(url->host,url->port, 
                    method+" "+path+(query?("?"+query):"")+" HTTP/1.0", 
                    request_headers, data); 
 
  if (!con->ok) { 
    if (con->errno) 
      error ("I/O error: %s\n", strerror (con->errno)); 
    return 0; 
  } 
  return con; 
} 
 
protected .Query do_udp_method(string method, Standards.URI url, 
                            void|mapping(string:int|string|array(string)) query_variables, 
                            void|mapping(string:string|array(string)) 
                            request_headers, void|Protocols.HTTP.Query con, 
                            void|string data) 
{ 
  if(!request_headers) 
    request_headers = ([]); 
 
  string path = url->path; 
  if(path=="") { 
    if(url->method=="httpmu") 
      path = "*"; 
    else 
      path = "/"; 
  } 
  string msg = method + " " + path + " HTTP/1.1\r\n"; 
 
  Stdio.UDP udp = Stdio.UDP(); 
  int port = 10000 + random(1000); 
  int i; 
  while(1) { 
    if( !catch( udp->bind(port++) ) ) break; 
    if( i++ > 1000 ) error("Could not open a UDP port.\n"); 
  } 
  if(url->method=="httpmu") { 
    mapping ifs = Stdio.gethostip(); 
    if(!sizeof(ifs)) error("No Internet interface found.\n"); 
    foreach(ifs; string i; mapping data) 
      if(sizeof(data->ips)) { 
        udp->enable_multicast(data->ips[0]); 
        break; 
      } 
    udp->add_membership(url->host, 0, 0); 
  } 
  udp->set_multicast_ttl(4); 
  udp->send(url->host, url->port, msg); 
  if (!con) { 
    con = .Query(); 
  } 
  con->con = udp; 
  return con; 
} 
 
//! Low level asynchronous HTTP call method. 
//! 
//! @param method 
//!   The HTTP method to use, e.g. @expr{"GET"@}. 
//! @param url 
//!   The URL to perform @[method] on. Should be a complete URL, 
//!   including protocol, e.g. @expr{"https://pike.lysator.liu.se/"@}. 
//! @param query_variables 
//!   Calls @[http_encode_query] and appends the result to the URL. 
//! @param request_headers 
//!   The HTTP headers to be added to the request. By default the 
//!   headers User-agent, Host and, if needed by the url, 
//!   Authorization will be added, with generated contents. 
//!   Providing these headers will override the default. Setting 
//!   the value to 0 will remove that header from the request. 
//! @param con 
//!   Previously initialized connection object. 
//!   In particular the callbacks must have been set 
//!   (@[Query.set_callbacks()]). 
//! @param data 
//!   Data payload to be transmitted in the request. 
//! 
//! @seealso 
//!   @[do_method()], @[Query.set_callbacks()] 
void do_async_method(string method, 
                     string|Standards.URI url, 
                     void|mapping(string:int|string|array(string)) query_variables, 
                     void|mapping(string:string|array(string)) request_headers, 
                     Protocols.HTTP.Query con, void|string data) 
{ 
  if(stringp(url)) 
    url=Standards.URI(url); 
 
  if( (< "httpu", "httpmu" >)[url->scheme] ) { 
    error("Asynchronous httpu or httpmu not yet supported.\n"); 
  } 
 
#if constant(SSL.sslfile)      
  if(url->scheme!="http" && url->scheme!="https") 
    error("Can't handle %O or any other protocols than HTTP or HTTPS.\n", 
          url->scheme); 
 
  con->https = (url->scheme=="https")? 1 : 0; 
#else 
  if(url->scheme!="http") 
    error("Can't handle %O or any other protocol than HTTP.\n", 
          url->scheme); 
#endif 
 
  if(!request_headers) 
    request_headers = ([]); 
  mapping default_headers = ([ 
    "user-agent" : "Mozilla/5.0 (compatible; MSIE 6.0; Pike HTTP client)" 
    " Pike/" + __REAL_MAJOR__ + "." + __REAL_MINOR__ + "." + __REAL_BUILD__, 
    "host" : url->host +  
    (url->port!=(url->scheme=="https"?443:80)?":"+url->port:"")]); 
 
  if(url->user || url->passwd) 
    default_headers->authorization = "Basic " 
                                   + MIME.encode_base64(url->user + ":" + 
                                                        (url->password || "")); 
  request_headers = default_headers | request_headers; 
 
  string query=url->query; 
  if(query_variables && sizeof(query_variables)) 
  { 
    if(query) 
      query+="&"+http_encode_query(query_variables); 
    else 
      query=http_encode_query(query_variables); 
  } 
 
  string path=url->path; 
  if(path=="") path="/"; 
 
  // Reset the state of con. 
  con->errno = 0; 
  con->ok = 0; 
  con->headers = 0; 
  con->protocol = 0; 
  con->status = 0; 
  con->status_desc = 0; 
  con->data_timeout = 120; 
  con->timeout = 120; 
  if (con->ssl) 
    con->ssl = 0; 
  con->con = 0; 
  con->request = 0; 
  con->buf = ""; 
  con->headerbuf = ""; 
  con->datapos = 0; 
  con->discarded_bytes = 0; 
  // con->conthread = 0; 
 
  con->async_request(url->host, url->port, 
                     method+" "+path+(query?("?"+query):"")+" HTTP/1.0", 
                     request_headers, data); 
} 
 
//! Low level asynchronous proxied HTTP call method. 
//! 
//! Makes an HTTP request through a proxy. 
//! 
//! @param proxy 
//!   URL for the proxy. 
//! 
//! @param user 
//! @param password 
//!   Proxy authentication credentials. 
//! 
//! @param method 
//!   The HTTP method to use, e.g. @expr{"GET"@}. 
//! @param url 
//!   The URL to perform @[method] on. Should be a complete URL, 
//!   including protocol, e.g. @expr{"https://pike.lysator.liu.se/"@}. 
//! @param query_variables 
//!   Calls @[http_encode_query] and appends the result to the URL. 
//! @param request_headers 
//!   The HTTP headers to be added to the request. By default the 
//!   headers User-agent, Host and, if needed by the url, 
//!   Authorization will be added, with generated contents. 
//!   Providing these headers will override the default. Setting 
//!   the value to 0 will remove that header from the request. 
//! @param con 
//!   Previously initialized connection object. 
//!   In particular the callbacks must have been set 
//!   (@[Query.set_callbacks()]). 
//! @param data 
//!   Data payload to be transmitted in the request. 
//! 
//! @seealso 
//!   @[do_async_method()], @[do_proxied_method()], @[Query.set_callbacks()] 
void do_async_proxied_method(string|Standards.URI proxy, 
                             string user, string password, 
                             string method, 
                             string|Standards.URI url, 
                             void|mapping(string:int|string|array(string)) query_variables, 
                             void|mapping(string:string|array(string)) request_headers, 
                             Protocols.HTTP.Query con, void|string data) 
{ 
  // Make sure we don't propagate our changes to the 
  // url and proxy objects below to the caller. 
  proxy = Standards.URI(proxy); 
  url = Standards.URI(url); 
 
  if( (< "httpu", "httpmu" >)[url->scheme] ) { 
    error("Asynchronous httpu or httpmu not yet supported.\n"); 
  } 
 
  mapping(string:string|array(string)) proxy_headers; 
 
  if( user || password ) 
  { 
    if( !request_headers ) 
      proxy_headers = ([]); 
    else 
      proxy_headers = request_headers + ([]); 
 
    proxy_headers["Proxy-Authorization"] = "Basic " 
      + MIME.encode_base64((user || "") + ":" + (password || "")); 
  } 
 
  if (url->scheme == "http") { 
    if( query_variables ) 
      url->set_query_variables( url->get_query_variables() + 
                                query_variables ); 
    string web_url = (string)url; 
 
    // Note: url object is wrecked here 
    url->host = proxy->host; 
    url->port = proxy->port; 
    query_variables = url->query = 0; 
    url->path = web_url; 
  } else { 
    error("Can't handle proxying of %O.\n", url->scheme); 
  } 
 
  do_async_method(method, url, query_variables, proxy_headers, con, data); 
} 
 
//! Sends a HTTP GET request to the server in the URL and returns the 
//! created and initialized @[Query] object. @expr{0@} is returned 
//! upon failure. If a query object having 
//! @expr{request_headers->Connection=="Keep-Alive"@} from a previous 
//! request is provided and the already established server connection 
//! can be used for the next request, you may gain some performance. 
//! 
.Query get_url(string|Standards.URI url, 
               void|mapping(string:int|string|array(string)) query_variables, 
               void|mapping(string:string|array(string)) request_headers, 
               void|Protocols.HTTP.Query con) 
{ 
  return do_method("GET", url, query_variables, request_headers, con); 
} 
 
//! Sends a HTTP PUT request to the server in the URL and returns the 
//! created and initialized @[Query] object. @expr{0@} is returned upon 
//! failure. If a query object having 
//! @expr{request_headers->Connection=="Keep-Alive"@} from a previous 
//! request is provided and the already established server connection 
//! can be used for the next request, you may gain some performance. 
//! 
.Query put_url(string|Standards.URI url, 
               void|string file, 
               void|mapping(string:int|string|array(string)) query_variables, 
               void|mapping(string:string|array(string)) request_headers, 
               void|Protocols.HTTP.Query con) 
{ 
  return do_method("PUT", url, query_variables, request_headers, con, file); 
} 
 
//! Sends a HTTP DELETE request to the server in the URL and returns 
//! the created and initialized @[Query] object. @expr{0@} is returned 
//! upon failure. If a query object having 
//! @expr{request_headers->Connection=="Keep-Alive"@} from a previous 
//! request is provided and the already established server connection 
//! can be used for the next request, you may gain some performance. 
//! 
.Query delete_url(string|Standards.URI url, 
                  void|mapping(string:int|string|array(string)) query_variables, 
                  void|mapping(string:string|array(string)) request_headers, 
                  void|Protocols.HTTP.Query con) 
{ 
  return do_method("DELETE", url, query_variables, request_headers, con); 
} 
 
//! Returns an array of @expr{({content_type, data})@} after calling 
//! the requested server for the information. @expr{0@} is returned 
//! upon failure. Redirects (HTTP 302) are automatically followed. 
//! 
array(string) get_url_nice(string|Standards.URI url, 
                           void|mapping(string:int|string|array(string)) query_variables, 
                           void|mapping(string:string|array(string)) request_headers, 
                           void|Protocols.HTTP.Query con) 
{ 
  .Query c; 
  multiset seen = (<>); 
  do { 
    if(!url) return 0; 
    if(seen[url] || sizeof(seen)>1000) return 0; 
    seen[url]=1; 
    c = get_url(url, query_variables, request_headers, con); 
    if(!c) return 0; 
    if(c->status==302) url = c->headers->location; 
  } while( c->status!=200 ); 
  return ({ c->headers["content-type"], c->data() }); 
} 
 
//! Returns the returned data after calling the requested server for 
//! information through HTTP GET. @expr{0@} is returned upon failure. 
//! Redirects (HTTP 302) are automatically followed. 
//! 
string get_url_data(string|Standards.URI url, 
                    void|mapping(string:int|string|array(string)) query_variables, 
                    void|mapping(string:string|array(string)) request_headers, 
                    void|Protocols.HTTP.Query con) 
{ 
  array(string) z = get_url_nice(url, query_variables, request_headers, con); 
  return z && z[1]; 
} 
 
//! Similar to @[get_url], except that query variables is sent as a 
//! POST request instead of a GET request.  If query_variables is a 
//! simple string, it is assumed to contain the verbatim 
//! body of the POST request; Content-Type must be properly specified 
//! manually, in this case. 
.Query post_url(string|Standards.URI url, 
        mapping(string:int|string|array(string))|string query_variables, 
                void|mapping(string:string|array(string)) request_headers, 
                void|Protocols.HTTP.Query con) 
{ 
  return do_method("POST", url, 0, stringp(query_variables) ? request_headers 
                   : (request_headers||([]))| 
                   (["content-type": 
                     "application/x-www-form-urlencoded"]), 
                   con, 
                   stringp(query_variables) ? query_variables 
                    : http_encode_query(query_variables)); 
} 
 
//! Similar to @[get_url_nice], except that query variables is sent as 
//! a POST request instead of a GET request. 
array(string) post_url_nice(string|Standards.URI url, 
                            mapping(string:int|string|array(string))|string query_variables, 
                            void|mapping(string:string|array(string)) request_headers, 
                            void|Protocols.HTTP.Query con) 
{ 
  .Query c = post_url(url, query_variables, request_headers, con); 
  return c && ({ c->headers["content-type"], c->data() }); 
} 
 
//! Similar to @[get_url_data], except that query variables is sent as 
//! a POST request instead of a GET request. 
string post_url_data(string|Standards.URI url, 
                     mapping(string:int|string|array(string))|string query_variables, 
                     void|mapping(string:string|array(string)) request_headers, 
                     void|Protocols.HTTP.Query con) 
{ 
  .Query z = post_url(url, query_variables, request_headers, con); 
  return z && z->data(); 
} 
 
//!   Encodes a query mapping to a string; 
//!   this protects odd - in http perspective - characters 
//!   like '&' and '#' and control characters, 
//!   and packs the result together in a HTTP query string. 
//! 
//!   Example: 
//!   @pre{ 
//!   > Protocols.HTTP.http_encode_query( (["anna":"eva","lilith":"blue"]) );   
//!     Result: "lilith=blue&anna=eva" 
//!     > Protocols.HTTP.http_encode_query( (["&amp;":"&","'=\"":"\0\0\0"]) );   
//!     Result: "%26amp%3b=%26&%27%3d%22=%00%00%00" 
//!   @} 
string http_encode_query(mapping(string:int|string|array(string)) variables) 
{ 
   return Array.map((array)variables, 
                    lambda(array(string|int|array(string)) v) 
                    { 
                       if (intp(v[1])) 
                          return uri_encode(v[0]); 
                       if (arrayp(v[1])) 
                         return map(v[1], lambda (string val) { 
                                            return  
                                              uri_encode(v[0])+"="+ 
                                              uri_encode(val); 
                                          })*"&"; 
                       return uri_encode(v[0])+"="+ uri_encode(v[1]); 
                    })*"&"; 
} 
 
protected local constant gen_delims = ":/?#[]@" // RFC 3986, section 2.2 
  // % is not part of the gen-delims set, but it effectively must be 
  // treated as a reserved character wrt encoding and decoding. 
  "%"; 
 
protected local constant sub_delims = "!$&'()*+,;="; // RFC 3986, section 2.2 
 
// US-ASCII chars that are neither reserved nor unreserved in RFC 3986. 
protected local constant other_chars = 
  (string) enumerate (0x20) + "\x7f" // Control chars 
  " \"<>\\^`{|}"; 
 
protected local constant eight_bit_chars = (string) enumerate (0x80, 1, 0x80); 
 
string percent_encode (string s) 
//! Encodes the given string using @tt{%XX@} encoding, except that URI 
//! unreserved chars are not encoded. The unreserved chars are 
//! @tt{A-Z@}, @tt{a-z@}, @tt{0-9@}, @tt{-@}, @tt{.@}, @tt{_@}, and 
//! @tt{~@} (see RFC 2396 section 2.3). 
//! 
//! 8-bit chars are encoded straight, and wider chars are not allowed. 
//! That means this encoding is applicable if @[s] is a binary octet 
//! string. If it is a character string then @[uri_encode] should be 
//! used instead. 
//! 
//! It is also slightly faster than @[uri_encode] if @[s] is known to 
//! contain only US-ASCII. 
{ 
  constant replace_chars = (gen_delims + sub_delims + 
                            other_chars + eight_bit_chars); 
  return replace (s, 
                  // The [*] syntax is hideous, but lambdas currently 
                  // don't work in constant expressions. :P 
                  sprintf ("%c", ((array(int)) replace_chars)[*]), 
                  // RFC 3986, 2.1: "For consistency, URI producers 
                  // and normalizers should use uppercase hexadecimal 
                  // digits for all percent- encodings." 
                  sprintf ("%%%02X", ((array(int)) replace_chars)[*])); 
} 
 
string percent_decode (string s) 
//! Decodes URI-style @tt{%XX@} encoded chars in the given string. 
//! 
//! @seealso 
//! @[percent_encode], @[uri_decode] 
//! 
//! @bugs 
//! This function currently does not accept wide string input, which 
//! is necessary to work as the reverse of @[iri_encode]. 
{ 
  return _Roxen.http_decode_string (s); 
} 
 
string uri_encode (string s) 
//! Encodes the given string using @tt{%XX@} encoding to be used as a 
//! component part in a URI. This means that all URI reserved and 
//! excluded characters are encoded, i.e. everything except @tt{A-Z@}, 
//! @tt{a-z@}, @tt{0-9@}, @tt{-@}, @tt{.@}, @tt{_@}, and @tt{~@} (see 
//! RFC 2396 section 2.3). 
//! 
//! 8-bit chars and wider are encoded using UTF-8 followed by 
//! percent-encoding. This follows RFC 3986 section 2.5, the 
//! IRI-to-URI conversion method in the IRI standard (RFC 3987) and 
//! appendix B.2 in the HTML 4.01 standard. It should work regardless 
//! of the charset used in the XML document the URI might be inserted 
//! into. 
//! 
//! @seealso 
//! @[uri_decode], @[uri_encode_invalids], @[iri_encode] 
{ 
  return percent_encode (string_to_utf8 (s)); 
} 
 
string uri_encode_invalids (string s) 
//! Encodes all "dangerous" chars in the given string using @tt{%XX@} 
//! encoding, so that it can be included as a URI in an HTTP message 
//! or header field. This includes control chars, space and various 
//! delimiter chars except those in the URI @tt{reserved@} set (RFC 
//! 2396 section 2.2). 
//! 
//! Since this function doesn't touch the URI @tt{reserved@} chars nor 
//! the escape char @tt{%@}, it can be used on a complete formatted 
//! URI or IRI. 
//! 
//! 8-bit chars and wider are encoded using UTF-8 followed by 
//! percent-encoding. This follows RFC 3986 section 2.5, the IRI 
//! standard (RFC 3987) and appendix B.2 in the HTML 4.01 standard. 
//! 
//! @note 
//! The characters in the URI @tt{reserved@} set are: @tt{:@}, 
//! @tt{/@}, @tt{?@}, @tt{#@}, @tt{[@}, @tt{]@}, @tt{@@@}, @tt{!@}, 
//! @tt{$@}, @tt{&@}, @tt{'@}, @tt{(@}, @tt{)@}, @tt{*@}, @tt{+@}, 
//! @tt{,@}, @tt{;@}, @tt{=@}. In addition, this function doesn't 
//! touch the escape char @tt{%@}. 
//! 
//! @seealso 
//! @[uri_decode], @[uri_encode] 
{ 
  constant replace_chars = other_chars + eight_bit_chars; 
  return replace (string_to_utf8 (s), 
                  sprintf ("%c", ((array(int)) replace_chars)[*]), 
                  sprintf ("%%%02X", ((array(int)) replace_chars)[*])); 
} 
 
string uri_decode (string s) 
//! Decodes URI-style @tt{%XX@} encoded chars in the given string, and 
//! then UTF-8 decodes the result. This is the reverse of 
//! @[uri_encode] and @[uri_encode_invalids]. 
//! 
//! @seealso 
//! @[uri_encode], @[uri_encode_invalids] 
{ 
  // Note: This currently does not quite work for URI-to-IRI 
  // conversion according to RFC 3987 section 3.2. Most importantly 
  // any invalid utf8-sequences should be left percent-encoded in the 
  // result. 
  return utf8_to_string (_Roxen.http_decode_string (s)); 
} 
 
string iri_encode (string s) 
//! Encodes the given string using @tt{%XX@} encoding to be used as a 
//! component part in an IRI (Internationalized Resource Identifier, 
//! see RFC 3987). This means that all chars outside the IRI 
//! @tt{iunreserved@} set are encoded, i.e. this function encodes 
//! equivalently to @[uri_encode] except that all 8-bit and wider 
//! characters are left as-is. 
//! 
//! @bugs 
//! This function currently does not encode chars in the Unicode 
//! private ranges, although that is strictly speaking required in 
//! some but not all IRI components. That could change if it turns out 
//! to be a problem. 
//! 
//! @seealso 
//! @[percent_decode], @[uri_encode] 
{ 
  constant replace_chars = gen_delims + sub_delims + other_chars; 
  return replace (s, 
                  sprintf ("%c", ((array(int)) replace_chars)[*]), 
                  sprintf ("%%%02X", ((array(int)) replace_chars)[*])); 
} 
 
#if 0 
// These functions are disabled since I haven't found a way to 
// implement them even remotely efficiently using pike only. /mast 
 
string uri_normalize (string s) 
//! Normalizes the URI-style @tt{%XX@} encoded string @[s] by decoding 
//! all URI @tt{unreserved@} chars, i.e. US-ASCII digits, letters, 
//! @tt{-@}, @tt{.@}, @tt{_@}, and @tt{~@}. 
//! 
//! Since only unreserved chars are decoded, the result is always 
//! semantically equivalent to the input. It's therefore safe to use 
//! this on a complete formatted URI. 
//! 
//! @seealso 
//! @[uri_decode], @[uri_encode], @[iri_normalize] 
{ 
  // FIXME 
} 
 
string iri_normalize (string s) 
//! Normalizes the IRI-style UTF-8 and @tt{%XX@} encoded string @[s] 
//! by decoding all IRI @tt{unreserved@} chars, i.e. everything except 
//! the URI @tt{reserved@} chars and control chars. 
//! 
//! Since only unreserved chars are decoded, the result is always 
//! semantically equivalent to the input. It's therefore safe to use 
//! this on a complete formatted IRI. 
//! 
//! @seealso 
//! @[iri_decode], @[uri_normalize] 
{ 
  // FIXME 
} 
 
#endif 
 
string quoted_string_encode (string s) 
//! Encodes the given string quoted to be used as content inside a 
//! @tt{quoted-string@} according to RFC 2616 section 2.2. The 
//! returned string does not include the surrounding @tt{"@} chars. 
//! 
//! @note 
//! The @tt{quoted-string@} quoting rules in RFC 2616 have several 
//! problems: 
//! 
//! @ul 
//! @item 
//!   Quoting is inconsistent since @tt{"@} is quoted as @tt{\"@}, but 
//!   @tt{\@} does not need to be quoted. This is resolved in the HTTP 
//!   bis update to mandate quoting of @tt{\@} too, which this 
//!   function performs. 
//! 
//! @item 
//!   Many characters are not quoted sufficiently to make the result 
//!   safe to use in an HTTP header, so this quoting is not enough if 
//!   @[s] contains NUL, CR, LF, or any 8-bit or wider character. 
//! @endul 
//! 
//! @seealso 
//! @[quoted_string_decode] 
{ 
  return replace (s, (["\"": "\\\"", "\\": "\\\\"])); 
} 
 
string quoted_string_decode (string s) 
//! Decodes the given string which has been encoded as a 
//! @tt{quoted-string@} according to RFC 2616 section 2.2. @[s] is 
//! assumed to not include the surrounding @tt{"@} chars. 
//! 
//! @seealso 
//! @[quoted_string_encode] 
{ 
  return map (s / "\\\\", replace, "\\", "") * "\\"; 
} 
 
// --- Compatibility code 
 
__deprecated__ string http_encode_string(string in) 
//! This is a deprecated alias for @[uri_encode], for compatibility 
//! with Pike 7.6 and earlier. 
//! 
//! In 7.6 this function didn't handle 8-bit and wider chars 
//! correctly. It encoded 8-bit chars directly to @tt{%XX@} escapes, 
//! and it used nonstandard @tt{%uXXXX@} escapes for 16-bit chars. 
//! 
//! That is considered a bug, and hence the function is changed. If 
//! you need the old buggy encoding then use the 7.6 compatibility 
//! version (@expr{#pike 7.6@}). 
//! 
//! @deprecated uri_encode 
{ 
  return uri_encode (in); 
} 
 
//! This function used to claim that it encodes the specified string 
//! according to the HTTP cookie standard. If fact it does not - it 
//! applies URI-style (i.e. @expr{%XX@}) encoding on some of the 
//! characters that cannot occur literally in cookie values. There 
//! exist some web servers (read Roxen and forks) that usually perform 
//! a corresponding nonstandard decoding of %-style escapes in cookie 
//! values in received requests. 
//! 
//! This function is deprecated. The function @[quoted_string_encode] 
//! performs encoding according to the standard, but it is not safe to 
//! use with arbitrary chars. Thus URI-style encoding using 
//! @[uri_encode] or @[percent_encode] is normally a good choice, if 
//! you can use @[uri_decode]/@[percent_decode] at the decoding end. 
//! 
//! @deprecated 
__deprecated__ string http_encode_cookie(string f) 
{ 
   return replace( 
      f, 
      ({ "\000", "\001", "\002", "\003", "\004", "\005", "\006", "\007", 
         "\010", "\011", "\012", "\013", "\014", "\015", "\016", "\017", 
         "\020", "\021", "\022", "\023", "\024", "\025", "\026", "\027", 
         "\030", "\031", "\032", "\033", "\034", "\035", "\036", "\037", 
         "\177", 
         "\200", "\201", "\202", "\203", "\204", "\205", "\206", "\207", 
         "\210", "\211", "\212", "\213", "\214", "\215", "\216", "\217", 
         "\220", "\221", "\222", "\223", "\224", "\225", "\226", "\227", 
         "\230", "\231", "\232", "\233", "\234", "\235", "\236", "\237", 
         " ", "%", "'", "\"", ",", ";", "=", ":" }), 
      ({  
         "%00", "%01", "%02", "%03", "%04", "%05", "%06", "%07", 
         "%08", "%09", "%0a", "%0b", "%0c", "%0d", "%0e", "%0f", 
         "%10", "%11", "%12", "%13", "%14", "%15", "%16", "%17", 
         "%18", "%19", "%1a", "%1b", "%1c", "%1d", "%1e", "%1f", 
         "%7f", 
         "%80", "%81", "%82", "%83", "%84", "%85", "%86", "%87", 
         "%88", "%89", "%8a", "%8b", "%8c", "%8d", "%8e", "%8f", 
         "%90", "%91", "%92", "%93", "%94", "%95", "%96", "%97", 
         "%98", "%99", "%9a", "%9b", "%9c", "%9d", "%9e", "%9f", 
         "%20", "%25", "%27", "%22", "%2c", "%3b", "%3d", "%3a" })); 
} 
 
//! Helper function for replacing HTML entities with the corresponding 
//! unicode characters. 
//! @deprecated Parser.parse_html_entities 
__deprecated__ string unentity(string s) 
{ 
  return master()->resolv("Parser.parse_html_entities")(s,1); 
}