NAME

       ost::URLStream - A URL processing version of TCPStream.

SYNOPSIS

       #include <url.h>

       Inherits ost::TCPStream.

   Public Types
       enum Error { errSuccess = 0, errUnreachable, errMissing, errDenied, errInvalid,
           errForbidden, errUnauthorized, errRelocated, errFailure, errTimeout, errInterface }
           Return error for url fetch.
       enum Authentication { authAnonymous = 0, authBasic }
           Type of authentication.
       enum Encoding { encodingBinary = 0, encodingChunked }
           Encoding used in transfer.
       enum Method { methodHttpGet, methodHttpPut, methodHttpPost, methodHttpPostMultipart,
           methodFtpGet, methodFtpPut, methodFileGet, methodFilePut }
           Type of fetch.
       enum Protocol { protocolHttp1_0, protocolHttp1_1 }
           http protocol version

   Public Member Functions
       URLStream (Family family=IPV4, timeout_t timer=0)
           Construct an instance of URL stream.
       URLStream & getline (char *buffer, size_t len)
           Line parsing with conversion.
       Error get (const char *url, size_t buffer=512)
           Get URL data from a named stream of a known buffer size.
       Error get (size_t buffer=512)
           Get URL data from a named stream of a known buffer size.
       Error submit (const char *url, const char **vars, size_t buffer=512)
           Submit URL with vars passed as argument array.
       Error post (const char *url, const char **vars, size_t buffer=512)
           Post URL vars with post method.
       Error post (const char *url, MIMEMultipartForm &form, size_t buffer=512)
           Post URL with MIME multipart form.
       Error head (const char *url, size_t buffer=512)
           Used to fetch header information for a resource.
       void close ()
           Close the URL stream for a new connection.
       void setReferer (const char *str)
           Set the referer url.
       void setHost (const char *str)
           Set the host for the url.
       void setAddress (const char *str)
           Set the address for the url.
       void setCookie (const char *str)
           Set the cookie to pass.
       void setUser (const char *str)
           Set user id for the url.
       void setPassword (const char *str)
           Set password for the url.
       void setAuthentication (Authentication a, const char *str=NULL)
           Set authentication type for the url.
       void setProxyUser (const char *str)
           Set proxy user id for the url.
       void setProxyPassword (const char *str)
           Set proxy password for the url.
       void setProxyAuthentication (Authentication a, const char *str=NULL)
           Set proxy authentication type for the url.
       void setPragma (const char *str)
           Set the pragmas.
       void setProxy (const char *host, tpport_t port)
           Set the proxy server used.
       void setAgent (const char *str)
           Set the agent.
       Method getMethod (void)
           Get url method (and protocol) employed.
       void setTimeout (timeout_t to)
           Set socket timeout characteristics for processing URL requests.
       void setFollow (bool enable)
           Specify url following.
       void setProtocol (Protocol pro)
           Specify http protocol level being used.
       void setLocalInterface (const char *intf)
           Specify local interface to use.

   Protected Member Functions
       Error sendHTTPHeader (const char *url, const char **vars, size_t bufsize)
           Send http header to server.
       int underflow (void)
           Called if stream buffer needs refilling.
       virtual int aRead (char *buffer, size_t len, timeout_t timer)
           Derived method for async or timed I/O function on url stream.
       virtual int aWrite (char *buffer, size_t len, timeout_t timer)
           Derived method for async or timed I/O function on url stream.
       virtual void httpHeader (const char *header, const char *value)
           Derived method to receive and parse http 'headers'.
       virtual char ** extraHeader (void)
           A virtual to insert additional header info into the request.

   Protected Attributes
       ost::String m_host
       ost::String m_address

   Related Functions
       (Note that these are not member functions.)
       __EXPORT char * urlDecode (char *source, char *dest=NULL)
           Decode an url parameter (ie '20' -> ' ')
       __EXPORT char * urlEncode (const char *source, char *dest, size_t size)
           Encode an url parameter (ie ' ' -> '+')
       __EXPORT char * b64Decode (char *src, char *dest=NULL)
           Decode a string using base64 coding.
       __EXPORT char * b64Encode (const char *source, char *dest, size_t size)
           Encode a string using base64 coding.
       __EXPORT size_t b64Encode (const unsigned char *src, size_t srcsize, char *dst, size_t
           dstsize)
           Encode a octet stream using base64 coding.
       __EXPORT size_t b64Decode (const char *src, unsigned char *dst, size_t dstsize)
           Decode a string using base64 coding.
       __EXPORT String b64Encode (const String &src)
           Encode a STL string using base64 coding into a STL string.
       __EXPORT String b64Decode (const String &src)
           Decode a STL string using base64 coding into an STL String.
       __EXPORT String b64Encode (const unsigned char *src, size_t srcsize)
           Encode a octet stream using base64 coding into a STL string.
       __EXPORT size_t b64Decode (const String &src, unsigned char *dst, size_t dstsize)
           Decode a string using base64 coding.

   Additional Inherited Members

Detailed Description

       A URL processing version of TCPStream.

       Author
           David Sugar dyfet@ostel.com

       C++ url processing stream class.

       Examples
           urlfetch.cpp, and xmlfetch.cpp.

Member Enumeration Documentation

   enum ost::URLStream::Authentication
       Type of authentication.

       Enumerator

       authAnonymous

       authBasic

   enum ost::URLStream::Encoding
       Encoding used in transfer.

       Enumerator

       encodingBinary

       encodingChunked

   enum ost::URLStream::Error
       Return error for url fetch.

       Enumerator

       errSuccess

       errUnreachable

       errMissing

       errDenied

       errInvalid

       errForbidden

       errUnauthorized

       errRelocated

       errFailure

       errTimeout

       errInterface

   enum ost::URLStream::Method
       Type of fetch.

       Enumerator

       methodHttpGet

       methodHttpPut

       methodHttpPost

       methodHttpPostMultipart

       methodFtpGet

       methodFtpPut

       methodFileGet

       methodFilePut

   enum ost::URLStream::Protocol
       http protocol version

       Enumerator

       protocolHttp1_0

       protocolHttp1_1

Constructor & Destructor Documentation

   ost::URLStream::URLStream (Family family = IPV4, timeout_t timer = 0)
       Construct an instance of URL stream.

       Parameters
           family protocol to use.
           timer for default timeout on I/O operations.

Member Function Documentation

   virtual int ost::URLStream::aRead (char * buffer, size_t len, timeout_t timer) [protected],
       [virtual]
       Derived method for async or timed I/O function on url stream.

       Returns
           number of bytes read or < 0 for error.

       Parameters
           buffer to read stream data into.
           len of bytes to read from stream.
           timer to wait for data in milliseconds.

   virtual int ost::URLStream::aWrite (char * buffer, size_t len, timeout_t timer) [protected],
       [virtual]
       Derived method for async or timed I/O function on url stream.

       Returns
           number of bytes written or < 0 for error.

       Parameters
           buffer to write stream data from.
           len of bytes to write to stream.
           timer to wait for data in milliseconds.

   void ost::URLStream::close ()
       Close the URL stream for a new connection.

   virtual char** ost::URLStream::extraHeader (void) [protected],  [virtual]
       A virtual to insert additional header info into the request.

       Returns
           array of header attributes to add.

   Error ost::URLStream::get (const char * url, size_t buffer = 512)
       Get URL data from a named stream of a known buffer size.

       Returns
           url error code.

       Parameters
           url name of resource.
           buffer size of buffer.

   Error ost::URLStream::get (size_t buffer = 512)
       Get URL data from a named stream of a known buffer size. Requesting URL defined in
       previous calls of setAddress() and setHost() functions.

       Returns
           url error code.

       Parameters
           buffer size of buffer.

   URLStream& ost::URLStream::getline (char * buffer, size_t len)
       Line parsing with conversion.

       Returns
           URLStream object reference.

       Parameters
           buffer to store.
           len maximum buffer size.

   Method ost::URLStream::getMethod (void) [inline]
       Get url method (and protocol) employed.

       Returns
           url method in effect.

   Error ost::URLStream::head (const char * url, size_t buffer = 512)
       Used to fetch header information for a resource.

       Returns
           url error code.

       Parameters
           url name of resource.
           buffer size of buffer.

   virtual void ost::URLStream::httpHeader (const char * header, const char * value) [protected],
       [virtual]
       Derived method to receive and parse http 'headers'.

       Parameters
           header keyword.
           value header keyword value.

   Error ost::URLStream::post (const char * url, const char ** vars, size_t buffer = 512)
       Post URL vars with post method.

       Returns
           success or error code.

       Parameters
           url name of resource being posted.
           vars to set in post.
           buffer size of buffer.

   Error ost::URLStream::post (const char * url, MIMEMultipartForm & form, size_t buffer = 512)
       Post URL with MIME multipart form.

       Returns
           success or error code.

       Parameters
           url name of resource being posted.
           form multi-part resource.
           buffer size to use.

   Error ost::URLStream::sendHTTPHeader (const char * url, const char ** vars, size_t bufsize)
       [protected]
       Send http header to server.

       Parameters
           url base to send header to
           vars to post or use in get method
           bufsize of stream buffering to use

       Returns
           success or class error

   void ost::URLStream::setAddress (const char * str) [inline]
       Set the address for the url.

       Parameters
           str address in the URL.

   void ost::URLStream::setAgent (const char * str) [inline]
       Set the agent.

       Parameters
           str agent value.

   void ost::URLStream::setAuthentication (Authentication a, const char * str = NULL)
       Set authentication type for the url.

       Parameters
           a authentication.
           str string.

   void ost::URLStream::setCookie (const char * str) [inline]
       Set the cookie to pass.

       Parameters
           str cookie string.

   void ost::URLStream::setFollow (bool enable) [inline]
       Specify url following. Set to false to disable following of relocation requests.

       Parameters
           enable true to enable following.

   void ost::URLStream::setHost (const char * str) [inline]
       Set the host for the url.

       Parameters
           str host address.

   void ost::URLStream::setLocalInterface (const char * intf) [inline]
       Specify local interface to use.

       Parameters
           intf Local interface name

   void ost::URLStream::setPassword (const char * str) [inline]
       Set password for the url.

       Parameters
           str password.

   void ost::URLStream::setPragma (const char * str) [inline]
       Set the pragmas.

       Parameters
           str pragma setting.

   void ost::URLStream::setProtocol (Protocol pro) [inline]
       Specify http protocol level being used.

       Parameters
           pro protocol level.

   void ost::URLStream::setProxy (const char * host, tpport_t port)
       Set the proxy server used.

       Parameters
           host proxy host.
           port proxy port.

   void ost::URLStream::setProxyAuthentication (Authentication a, const char * str = NULL)
       Set proxy authentication type for the url.

       Parameters
           a authentication.
           str string.

   void ost::URLStream::setProxyPassword (const char * str) [inline]
       Set proxy password for the url.

       Parameters
           str password.

   void ost::URLStream::setProxyUser (const char * str) [inline]
       Set proxy user id for the url.

       Parameters
           str user id.

   void ost::URLStream::setReferer (const char * str)
       Set the referer url.

       Parameters
           str referer string.

   void ost::URLStream::setTimeout (timeout_t to) [inline]
       Set socket timeout characteristics for processing URL requests. Set to 0 for no default
       timeouts.

       Parameters
           to timeout to set.

   void ost::URLStream::setUser (const char * str) [inline]
       Set user id for the url.

       Parameters
           str user id.

   Error ost::URLStream::submit (const char * url, const char ** vars, size_t buffer = 512)
       Submit URL with vars passed as argument array. This submit assumes 'GET' method. Use
       'post' member to perform post.

       Returns
           url error code.

       Parameters
           url name of resource.
           vars to set.
           buffer size of buffer.

   int ost::URLStream::underflow (void) [protected]
       Called if stream buffer needs refilling.

       Returns
           number of bytes refilled or error if < 0

Friends And Related Function Documentation

   __EXPORT char * b64Decode (char * src, char * dest = NULL) [related]
       Decode a string using base64 coding. Destination size should be at least strlen(src)+1.
       Destination will be a string, so is always terminated . This function is deprecated,
       base64 can use binary source, not only string use overloaded b64Decode.

       Returns
           string coded

       Parameters
           src source buffer
           dest destination buffer. If NULL src is used

   __EXPORT size_t b64Decode (const char * src, unsigned char * dst, size_t dstsize) [related]
       Decode a string using base64 coding. Destination size should be at least strlen(src)/4*3.
       Destination are not string terminated (It's just a octet stream).

       Returns
           number of octets written into destination buffer

       Parameters
           src source string
           dst destination octet buffer
           dstsize destination buffer size

   __EXPORT String b64Decode (const String & src) [related]
       Decode a STL string using base64 coding into an STL String. Destination size should be at
       least strlen(src)/4*3. Destination are not string terminated (It's just a octet stream).

       Returns
           decoded string

       Parameters
           src source string

   __EXPORT size_t b64Decode (const String & src, unsigned char * dst, size_t dstsize) [related]
       Decode a string using base64 coding. Destination size should be at least strlen(src)/4*3.
       Destination are not string terminated (It's just a octet stream).

       Returns
           number of octets written into destination buffer

       Parameters
           src source string
           dst destination octet buffer
           dstsize destination buffer size

   __EXPORT char * b64Encode (const char * source, char * dest, size_t size) [related]
       Encode a string using base64 coding. Destination size should be at least
       strlen(src)/4*3+1. Destination is string terminated. This function is deprecated, coded
       stream can contain terminator character use overloaded b64Encode instead.

       Returns
           destination buffer

       Parameters
           source source string
           dest destination octet buffer
           size destination buffer size

   __EXPORT String b64Encode (const String & src) [related]
       Encode a STL string using base64 coding into a STL string.

       Returns
           base 64 encoded string

       Parameters
           src source string

   __EXPORT String b64Encode (const unsigned char * src, size_t srcsize) [related]
       Encode a octet stream using base64 coding into a STL string.

       Returns
           base 64 encoded string

       Parameters
           src source buffer
           srcsize source buffer size

   __EXPORT size_t b64Encode (const unsigned char * src, size_t srcsize, char * dst, size_t
       dstsize) [related]
       Encode a octet stream using base64 coding. Destination size should be at least
       (srcsize+2)/3*4+1. Destination will be a string, so is always terminated (unless you pass
       dstsize == 0).

       Returns
           size of string written not counting terminator

       Parameters
           src source buffer
           srcsize source buffer size
           dst destination buffer
           dstsize destination buffer size

   __EXPORT char * urlDecode (char * source, char * dest = NULL) [related]
       Decode an url parameter (ie '\%20' -> ' ')

       Parameters
           source string
           dest destination buffer. If NULL source is used

   __EXPORT char * urlEncode (const char * source, char * dest, size_t size) [related]
       Encode an url parameter (ie ' ' -> '+')

       Parameters
           source string
           dest destination buffer. Do not overlap with source
           size destination buffer size.

Member Data Documentation

   ost::String ost::URLStream::m_address [protected]
   ost::String ost::URLStream::m_host [protected]

Author

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