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ost::URLStream

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.)

char * urlDecode (char *source, char *dest=NULL)
char * urlEncode (const char *source, char *dest, size_t size)
char * b64Decode (char *src, char *dest=NULL)
char * b64Encode (const char *source, char *dest, size_t size)
size_t b64Encode (const unsigned char *src, size_t srcsize, char *dst, size_t dstsize)
size_t b64Decode (const char *src, unsigned char *dst, size_t dstsize)
String b64Encode
(const String &src)
String b64Decode
(const String &src)
String b64Encode
(const unsigned char *src, size_t srcsize)
size_t b64Decode (const String &src, unsigned char *dst, size_t dstsize)

Detailed Description

A URL processing version of TCPStream.

Author:

David Sugar <dyfet AT ostel DOT 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

Reimplemented from ost::Socket.

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 (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.

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.

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.

Examples:

urlfetch.cpp, and xmlfetch.cpp.

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::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::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.

Reimplemented from ost::TCPStream.

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

Reimplemented from ost::TCPStream.

Friends And Related Function Documentation

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

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

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

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

Examples:

url1.cpp.

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

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

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

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

Examples:

url1.cpp.

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

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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