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std.net.curl


Category	Functions
High level	download upload get post put del options trace connect byLine byChunk byLineAsync byChunkAsync
Low level	HTTP FTP SMTP

Networking client functionality as provided by libcurl. The libcurl library must be installed on the system in order to use this module.

Compared to using libcurl directly this module allows simpler client code for common uses, requires no unsafe operations, and integrates better with the rest of the language. Futhermore it provides range access to protocols supported by libcurl both synchronously and asynchronously.

A high level and a low level API are available. The high level API is built entirely on top of the low level one.

The high level API is for commonly used functionality such as HTTP/FTP get. The byLineAsync and byChunkAsync provides asynchronous ranges that performs the request in another thread while handling a line/chunk in the current thread.

The low level API allows for streaming and other advanced features.

Cheat Sheet
Function Name	Description
*High level*
download	download("ftp.digitalmars.com/sieve.ds", "/tmp/downloaded-ftp-file") downloads file from URL to file system.
upload	upload("/tmp/downloaded-ftp-file", "ftp.digitalmars.com/sieve.ds"); uploads file from file system to URL.
get	get("dlang.org") returns a string containing the dlang.org web page.
put	put("dlang.org", "Hi") returns a string containing the dlang.org web page. after a HTTP PUT of "hi"
post	post("dlang.org", "Hi") returns a string containing the dlang.org web page. after a HTTP POST of "hi"
byLine	byLine("dlang.org") returns a range of strings containing the dlang.org web page.
byChunk	byChunk("dlang.org", 10) returns a range of ubyte[10] containing the dlang.org web page.
byLineAsync	byLineAsync("dlang.org") returns a range of strings containing the dlang.org web page asynchronously.
byChunkAsync	byChunkAsync("dlang.org", 10) returns a range of ubyte[10] containing the dlang.org web page asynchronously.
*Low level*
HTTP	HTTP struct for advanced usage
FTP	FTP struct for advanced usage
SMTP	SMTP struct for advanced usage

Example:

import std.net.curl, std.stdio;

// Return a string containing the content specified by an URL
string content = get("dlang.org");

// Post data and return a string containing the content specified by an URL
string content = post("mydomain.com/here.cgi", "post data");

// Get content of file from ftp server
string content = get("ftp.digitalmars.com/sieve.ds");

// Post and print out content line by line. The request is done in another thread.
foreach (line; byLineAsync("dlang.org", "Post data"))
    writeln(line);

// Get using a line range and proxy settings
auto client = HTTP();
client.proxy = "1.2.3.4";
foreach (line; byLine("dlang.org", client))
    writeln(line);

For more control than the high level functions provide, use the low level API:

Example:

import std.net.curl, std.stdio;

// GET with custom data receivers
auto http = HTTP("dlang.org");
http.onReceiveHeader =
    (in char[] key, in char[] value) { writeln(key, ": ", value); };
http.onReceive = (ubyte[] data) { /+ drop +/ return data.length; };
http.perform();

First, an instance of the reference-counted HTTP struct is created. Then the custom delegates are set. These will be called whenever the HTTP instance receives a header and a data buffer, respectively. In this simple example, the headers are writting to stdout and the data is ignored. If the request should be stopped before it has finished then return something less than data.length from the onReceive callback. See onReceiveHeader/onReceive for more information. Finally the HTTP request is effected by calling perform(), which is synchronous.

Source:
std/net/curl.d

License:
Boost License 1.0.

Authors:
Jonas Drewsen. Some of the SMTP code contributed by Jimmy Cao.

Credits:
The functionally is based on libcurl. LibCurl is licensed under an MIT/X derivate license.

struct AutoProtocol;

Connection type used when the URL should be used to auto detect the protocol.

This struct is used as placeholder for the connection parameter when calling the high level API and the connection type (HTTP/FTP) should be guessed by inspecting the URL parameter.

The rules for guessing the protocol are: 1, if URL starts with ftp://, ftps:// or ftp. then FTP connection is assumed. 2, HTTP connection otherwise.

Example:

 import std.net.curl;
 // Two requests below will do the same.
 string content;

 // Explicit connection provided
 content = get!HTTP("dlang.org");

 // Guess connection type by looking at the URL
 content = get!AutoProtocol("ftp://foo.com/file");
 // and since AutoProtocol is default this is the same as
 connect = get("ftp://foo.com/file");
 // and will end up detecting FTP from the url and be the same as
 connect = get!FTP("ftp://foo.com/file");

void download(Conn = AutoProtocol)(const(char)[] url, string saveToPath, Conn conn = Conn());

HTTP/FTP download to local file system.

Parameters:

url	resource to download
saveToPath	path to store the downloaded content on local disk
conn	connection to use e.g. FTP or HTTP. The default AutoProtocol will guess connection type and create a new instance for this call only.

Example:

 import std.net.curl;
 download("ftp.digitalmars.com/sieve.ds", "/tmp/downloaded-ftp-file");
 download("d-lang.appspot.com/testUrl2", "/tmp/downloaded-http-file");

void upload(Conn = AutoProtocol)(string loadFromPath, const(char)[] url, Conn conn = Conn());

Upload file from local files system using the HTTP or FTP protocol.

Parameters:

loadFromPath	path load data from local disk.
url	resource to upload to
conn	connection to use e.g. FTP or HTTP. The default AutoProtocol will guess connection type and create a new instance for this call only.

Example:

 import std.net.curl;
 upload("/tmp/downloaded-ftp-file", "ftp.digitalmars.com/sieve.ds");
 upload("/tmp/downloaded-http-file", "d-lang.appspot.com/testUrl2");

T[] get(Conn = AutoProtocol, T = char)(const(char)[] url, Conn conn = Conn());

HTTP/FTP get content.

Parameters:

url	resource to get
conn	connection to use e.g. FTP or HTTP. The default AutoProtocol will guess connection type and create a new instance for this call only. The template parameter T specifies the type to return. Possible values are char and ubyte to return char[] or ubyte[].

Example:

 import std.net.curl;
 string content = get("d-lang.appspot.com/testUrl2");

Returns:
A T[] range containing the content of the resource pointed to by the URL.

See Also:
HTTP.Method

T[] post(T = char, PostUnit)(const(char)[] url, const(PostUnit)[] postData, HTTP conn = HTTP());

HTTP post content.

Parameters:

url	resource to post to
putData	data to send as the body of the request. An array of an arbitrary type is accepted and will be cast to ubyte[] before sending it.
conn	connection to use e.g. FTP or HTTP. The default AutoProtocol will guess connection type and create a new instance for this call only. The template parameter T specifies the type to return. Possible values are char and ubyte to return char[] or ubyte[].

Example:

 import std.net.curl;
 string content = post("d-lang.appspot.com/testUrl2", [1,2,3,4]);

Returns:
A T[] range containing the content of the resource pointed to by the URL.

See Also:
HTTP.Method

T[] put(Conn = AutoProtocol, T = char, PutUnit)(const(char)[] url, const(PutUnit)[] putData, Conn conn = Conn());

HTTP/FTP put content.

Parameters:

url	resource to put
putData	data to send as the body of the request. An array of an arbitrary type is accepted and will be cast to ubyte[] before sending it.
conn	connection to use e.g. FTP or HTTP. The default AutoProtocol will guess connection type and create a new instance for this call only. The template parameter T specifies the type to return. Possible values are char and ubyte to return char[] or ubyte[].

Example:

 import std.net.curl;
 string content = put("d-lang.appspot.com/testUrl2",
                      "Putting this data");

Returns:
A T[] range containing the content of the resource pointed to by the URL.

See Also:
HTTP.Method

void del(Conn = AutoProtocol)(const(char)[] url, Conn conn = Conn());

HTTP/FTP delete content.

Parameters:

url	resource to delete
conn	connection to use e.g. FTP or HTTP. The default AutoProtocol will guess connection type and create a new instance for this call only.

Example:

 import std.net.curl;
 del("d-lang.appspot.com/testUrl2");

See Also:
HTTP.Method

T[] options(T = char, OptionsUnit)(const(char)[] url, const(OptionsUnit)[] optionsData = null, HTTP conn = HTTP());

HTTP options request.

Parameters:

url	resource make a option call to
optionsData	options data to send as the body of the request. An array of an arbitrary type is accepted and will be cast to ubyte[] before sending it.
conn	connection to use e.g. FTP or HTTP. The default AutoProtocol will guess connection type and create a new instance for this call only. The template parameter T specifies the type to return. Possible values are char and ubyte to return char[] or ubyte[]. Currently the HTTP RFC does not specify any usage of the optionsData and for this reason the example below does not send optionsData to the server.

Example:

 import std.net.curl;
 auto http = HTTP();
 options("d-lang.appspot.com/testUrl2", null, http);
 writeln("Allow set to " ~ http.responseHeaders["Allow"]);

Returns:
A T[] range containing the options of the resource pointed to by the URL.

See Also:
HTTP.Method

T[] trace(T = char)(const(char)[] url, HTTP conn = HTTP());

HTTP trace request.

Parameters:

url	resource make a trace call to
conn	connection to use e.g. FTP or HTTP. The default AutoProtocol will guess connection type and create a new instance for this call only. The template parameter T specifies the type to return. Possible values are char and ubyte to return char[] or ubyte[].

Example:

 import std.net.curl;
 trace("d-lang.appspot.com/testUrl1");

Returns:
A T[] range containing the trace info of the resource pointed to by the URL.

See Also:
HTTP.Method

T[] connect(T = char)(const(char)[] url, HTTP conn = HTTP());

HTTP connect request.

Parameters:

url	resource make a connect to
conn	connection to use e.g. FTP or HTTP. The default AutoProtocol will guess connection type and create a new instance for this call only. The template parameter T specifies the type to return. Possible values are char and ubyte to return char[] or ubyte[].

Example:

 import std.net.curl;
 connect("d-lang.appspot.com/testUrl1");

Returns:
A T[] range containing the connect info of the resource pointed to by the URL.

See Also:
HTTP.Method

auto byLine(Conn = AutoProtocol, Terminator = char, Char = char)(const(char)[] url, KeepTerminator keepTerminator = KeepTerminator.no, Terminator terminator = '\x0a', Conn conn = Conn());

struct ByLineBuffer(Char) { bool linePresent; bool EOF; Char[] buffer; ubyte[] decodeRemainder;

bool append(const(ubyte)[] data) { byLineBuffer ~= data; }

@property bool linePresent() { return byLinePresent; }

Char[] get() { if (!linePresent) { // Decode ubyte[] into Char[] until a Terminator is found. // If not Terminator is found and EOF is false then raise an // exception. } return byLineBuffer; }

} HTTP/FTP fetch content as a range of lines.

A range of lines is returned when the request is complete. If the method or other request properties is to be customized then set the conn parameter with a HTTP/FTP instance that has these properties set.

Example:

 import std.net.curl, std.stdio;
 foreach (line; byLine("dlang.org"))
     writeln(line);

Parameters:

url	The url to receive content from
postData	Data to HTTP Post
keepTerminator	KeepTerminator.yes signals that the line terminator should be returned as part of the lines in the range.
terminator	The character that terminates a line
conn	The connection to use e.g. HTTP or FTP.

Returns:
A range of Char[] with the content of the resource pointer to by the URL

auto byChunk(Conn = AutoProtocol)(const(char)[] url, size_t chunkSize = 1024, Conn conn = Conn());

HTTP/FTP fetch content as a range of chunks.

A range of chunks is returned when the request is complete. If the method or other request properties is to be customized then set the conn parameter with a HTTP/FTP instance that has these properties set.

Example:

 import std.net.curl, std.stdio;
 foreach (chunk; byChunk("dlang.org", 100))
     writeln(chunk); // chunk is ubyte[100]

Parameters:

url	The url to receive content from
chunkSize	The size of each chunk
conn	The connection to use e.g. HTTP or FTP.

Returns:
A range of ubyte[chunkSize] with the content of the resource pointer to by the URL

auto byLineAsync(Conn = AutoProtocol, Terminator = char, Char = char, PostUnit)(const(char)[] url, const(PostUnit)[] postData, KeepTerminator keepTerminator = KeepTerminator.no, Terminator terminator = '\x0a', size_t transmitBuffers = 10, Conn conn = Conn()); auto byLineAsync(Conn = AutoProtocol, Terminator = char, Char = char)(const(char)[] url, KeepTerminator keepTerminator = KeepTerminator.no, Terminator terminator = '\x0a', size_t transmitBuffers = 10, Conn conn = Conn());

HTTP/FTP fetch content as a range of lines asynchronously.

A range of lines is returned immediately and the request that fetches the lines is performed in another thread. If the method or other request properties is to be customized then set the conn parameter with a HTTP/FTP instance that has these properties set.

If postData is non-null the method will be set to post for HTTP requests.

The background thread will buffer up to transmitBuffers number of lines before it stops receiving data from network. When the main thread reads the lines from the range it frees up buffers and allows for the background thread to receive more data from the network.

If no data is available and the main thread accesses the range it will block until data becomes available. An exception to this is the wait(Duration) method on the AsyncLineInputRange. This method will wait at maximum for the specified duration and return true if data is available.

Example:

 import std.net.curl, std.stdio;
 // Get some pages in the background
 auto range1 = byLineAsync("www.google.com");
 auto range2 = byLineAsync("www.wikipedia.org");
 foreach (line; byLineAsync("dlang.org"))
     writeln(line);

 // Lines already fetched in the background and ready
 foreach (line; range1) writeln(line);
 foreach (line; range2) writeln(line);

 import std.net.curl, std.stdio;
 // Get a line in a background thread and wait in
 // main thread for 2 seconds for it to arrive.
 auto range3 = byLineAsync("dlang.com");
 if (range.wait(dur!"seconds"(2)))
     writeln(range.front);
 else
     writeln("No line received after 2 seconds!");

Parameters:

url	The url to receive content from
postData	Data to HTTP Post
keepTerminator	KeepTerminator.yes signals that the line terminator should be returned as part of the lines in the range.
terminator	The character that terminates a line
transmitBuffers	The number of lines buffered asynchronously
conn	The connection to use e.g. HTTP or FTP.

Returns:
A range of Char[] with the content of the resource pointer to by the URL.

auto byChunkAsync(Conn = AutoProtocol, PostUnit)(const(char)[] url, const(PostUnit)[] postData, size_t chunkSize = 1024, size_t transmitBuffers = 10, Conn conn = Conn()); auto byChunkAsync(Conn = AutoProtocol)(const(char)[] url, size_t chunkSize = 1024, size_t transmitBuffers = 10, Conn conn = Conn());

HTTP/FTP fetch content as a range of chunks asynchronously.

A range of chunks is returned immediately and the request that fetches the chunks is performed in another thread. If the method or other request properties is to be customized then set the conn parameter with a HTTP/FTP instance that has these properties set.

If postData is non-null the method will be set to post for HTTP requests.

The background thread will buffer up to transmitBuffers number of chunks before is stops receiving data from network. When the main thread reads the chunks from the range it frees up buffers and allows for the background thread to receive more data from the network.

If no data is available and the main thread access the range it will block until data becomes available. An exception to this is the wait(Duration) method on the AsyncChunkInputRange. This method will wait at maximum for the specified duration and return true if data is available.

Example:

 import std.net.curl, std.stdio;
 // Get some pages in the background
 auto range1 = byChunkAsync("www.google.com", 100);
 auto range2 = byChunkAsync("www.wikipedia.org");
 foreach (chunk; byChunkAsync("dlang.org"))
     writeln(chunk); // chunk is ubyte[100]

 // Chunks already fetched in the background and ready
 foreach (chunk; range1) writeln(chunk);
 foreach (chunk; range2) writeln(chunk);

 import std.net.curl, std.stdio;
 // Get a line in a background thread and wait in
 // main thread for 2 seconds for it to arrive.
 auto range3 = byChunkAsync("dlang.com", 10);
 if (range.wait(dur!"seconds"(2)))
     writeln(range.front);
 else
     writeln("No chunk received after 2 seconds!");

Parameters:

url	The url to receive content from
postData	Data to HTTP Post
terminator	The character that terminates a line
chunkSize	The size of the chunks
transmitBuffers	The number of chunks buffered asynchronously
conn	The connection to use e.g. HTTP or FTP.

Returns:
A range of ubyte[chunkSize] with the content of the resource pointer to by the URL.

struct HTTP;

HTTP client functionality.

Example:

 import std.net.curl, std.stdio;

 // Get with custom data receivers
 auto http = HTTP("dlang.org");
 http.onReceiveHeader =
     (in char[] key, in char[] value) { writeln(key ~ ": " ~ value); };
 http.onReceive = (ubyte[] data) { /+ drop +/ return data.length; };
 http.perform();

 // Put with data senders
 auto msg = "Hello world";
 http.contentLength = msg.length;
 http.onSend = (void[] data)
 {
     auto m = cast(void[])msg;
     size_t len = m.length > data.length ? data.length : m.length;
     if (len == 0) return len;
     data[0..len] = m[0..len];
     msg = msg[len..$];
     return len;
 };
 http.perform();

 // Track progress
 http.method = HTTP.Method.get;
 http.url = "http://upload.wikimedia.org/wikipedia/commons/"
            "5/53/Wikipedia-logo-en-big.png";
 http.onReceive = (ubyte[] data) { return data.length; };
 http.onProgress = (double dltotal, double dlnow,
                    double ultotal, double ulnow)
 {
     writeln("Progress ", dltotal, ", ", dlnow, ", ", ultotal, ", ", ulnow);
     return 0;
 };
 http.perform();

See Also:
RFC2616

alias etc.c.curl.CurlAuth AuthMethod;

Authentication method equal to etc.c.curl.CurlAuth

alias etc.c.curl.CurlTimeCond TimeCond;

Time condition enumeration as an alias of etc.c.curl.CurlTimeCond

RFC2616 Section 14.25

this(const(char)[] url);

Constructor taking the url as parameter.

void perform();

Perform a http request.

After the HTTP client has been setup and possibly assigned callbacks the perform() method will start performing the request towards the specified server.

@property void url(const(char)[] url);

The URL to specify the location of the resource.

alias etc.c.curl.CurlReadFunc.pause requestPause;

Value to return from onSend/onReceive delegates in order to pause a request

alias etc.c.curl.CurlReadFunc.abort requestAbort;

Value to return from onSend delegate in order to abort a request

@property bool isStopped();

True if the instance is stopped. A stopped instance is not usable.

void shutdown();

Stop and invalidate this instance.

@property void verbose(bool on);

Set verbose. This will print request information to stderr.

@property void dataTimeout(Duration d);

Set timeout for activity on connection.

@property void operationTimeout(Duration d);

Set maximum time an operation is allowed to take. This includes dns resolution, connecting, data transfer, etc.

@property void connectTimeout(Duration d);

Set timeout for connecting.

@property void proxy(const(char)[] host);

Proxy

See:
proxy

@property void proxyPort(ushort port);

Proxy port

See:
proxy_port

alias etc.c.curl.CurlProxy CurlProxy;

Type of proxy

@property void proxyType(CurlProxy type);

Proxy type

See:
proxy_type

@property void dnsTimeout(Duration d);

DNS lookup timeout.

@property void netInterface(const(char)[] i); @property void netInterface(const(ubyte)[4LU] i); @property void netInterface(InternetAddress i);

The network interface to use in form of the the IP of the interface.

Example:

 theprotocol.netInterface = "192.168.1.32";
 theprotocol.netInterface = [ 192, 168, 1, 32 ];

See:
std.socket.InternetAddress

@property void localPort(ushort port);

Set the local outgoing port to use.

Parameters:

ushort port

the first outgoing port number to try and use

@property void localPortRange(ushort range);

Set the local outgoing port range to use. This can be used together with the localPort property.

Parameters:

ushort range

if the first port is occupied then try this many port number forwards

@property void tcpNoDelay(bool on);

Set the tcp no-delay socket option on or off.

See:
nodelay

void setAuthentication(const(char)[] username, const(char)[] password, const(char)[] domain = "");

Set the user name, password and optionally domain for authentication purposes.

Some protocols may need authentication in some cases. Use this function to provide credentials.

Parameters:

const(char)[] username	the username
const(char)[] password	the password
const(char)[] domain	used for NTLM authentication only and is set to the NTLM domain name

@property void onSend(ulong delegate(void[]) callback);

The event handler that gets called when data is needed for sending. The length of the void[] specifies the maximum number of bytes that can be sent.

Returns:
The callback returns the number of elements in the buffer that have been filled and are ready to send. The special value .abortRequest can be returned in order to abort the current request. The special value .pauseRequest can be returned in order to pause the current request.

Example:

 import std.net.curl;
 string msg = "Hello world";
 auto client = HTTP("dlang.org");
 client.onSend = delegate size_t(void[] data)
 {
     auto m = cast(void[])msg;
     size_t length = m.length > data.length ? data.length : m.length;
     if (length == 0) return 0;
     data[0..length] = m[0..length];
     msg = msg[length..$];
     return length;
 };
 client.perform();

@property void onReceive(ulong delegate(ubyte[]) callback);

The event handler that receives incoming data. Be sure to copy the incoming ubyte[] since it is not guaranteed to be valid after the callback returns.

Returns:
The callback returns the incoming bytes read. If not the entire array is the request will abort. The special value .pauseRequest can be returned in order to pause the current request.

Example:

 import std.net.curl, std.stdio;
 auto client = HTTP("dlang.org");
 client.onReceive = (ubyte[] data)
 {
     writeln("Got data", to!(const(char)[])(data));
     return data.length;
 };
 client.perform();

@property void onProgress(int delegate(ulong dlTotal, ulong dlNow, ulong ulTotal, ulong ulNow) callback);

The event handler that gets called to inform of upload/download progress.

Parameters:

dlTotal	total bytes to download
dlNow	currently downloaded bytes
ulTotal	total bytes to upload
ulNow	currently uploaded bytes

Returns:
Return 0 from the callback to signal success, return non-zero to abort transfer

Example:

 import std.net.curl, std.stdio;
 auto client = HTTP("dlang.org");
 client.onProgress = delegate int(size_t dl, size_t dln, size_t ul, size_t ult)
 {
     writeln("Progress: downloaded ", dln, " of ", dl);
     writeln("Progress: uploaded ", uln, " of ", ul);
 };
 client.perform();

void clearRequestHeaders();

Clear all outgoing headers.

void addRequestHeader(const(char)[] name, const(char)[] value);

Add a header e.g. "X-CustomField: Something is fishy".

There is no remove header functionality. Do a clearRequestHeaders and set the needed headers instead.

Example:

 import std.net.curl;
 auto client = HTTP();
 client.addRequestHeader("X-Custom-ABC", "This is the custom value");
 string content = get("dlang.org", client);

@property string[string] responseHeaders();

The headers read from a successful response.

@property void method(Method m); @property Method method();

HTTP method used.

@property StatusLine statusLine();

HTTP status line of last response. One call to perform may result in several requests because of redirection.

void setCookieJar(const(char)[] path);

Set a file path to where a cookie jar should be read/stored.

void flushCookieJar();

Flush cookie jar to disk.

void clearSessionCookies();

Clear session cookies.

void clearAllCookies();

Clear all cookies.

void setTimeCondition(HTTP.TimeCond cond, SysTime timestamp);

Set time condition on the request.

Parameters:

HTTP.TimeCond cond	CurlTimeCond.{none,ifmodsince,ifunmodsince,lastmod}
SysTime timestamp	Timestamp for the condition RFC2616 Section 14.25

@property void postData(const(void)[] data);

Specifying data to post when not using the onSend callback.

The data is NOT copied by the library. Content-Type will default to application/octet-stream. Data is not converted or encoded by this method.

Example:

 import std.net.curl, std.stdio;
 auto http = HTTP("http://www.mydomain.com");
 http.onReceive = (ubyte[] data) { writeln(to!(const(char)[])(data)); return data.length; };
 http.postData = [1,2,3,4,5];
 http.perform();

@property void postData(const(char)[] data);

Specifying data to post when not using the onSend callback.

The data is NOT copied by the library. Content-Type will default to text/plain. Data is not converted or encoded by this method.

Example:

 import std.net.curl, std.stdio;
 auto http = HTTP("http://www.mydomain.com");
 http.onReceive = (ubyte[] data) { writeln(to!(const(char)[])(data)); return data.length; };
 http.postData = "The quick....";
 http.perform();

@property void onReceiveHeader(void delegate(const(char[]) key, const(char[]) value) callback);

Set the event handler that receives incoming headers.

The callback will receive a header field key, value as parameter. The const(char)[] arrays are not valid after the delegate has returned.

Example:

 import std.net.curl, std.stdio;
 auto http = HTTP("dlang.org");
 http.onReceive = (ubyte[] data) { writeln(to!(const(char)[])(data)); return data.length; };
 http.onReceiveHeader = (in char[] key, in char[] value) { writeln(key, " = ", value); };
 http.perform();

@property void onReceiveStatusLine(void delegate(StatusLine) callback);

Callback for each received StatusLine.

Notice that several callbacks can be done for each call to perform() due to redirections.

See Also:
StatusLine

@property void contentLength(size_t len);

The content length in bytes when using request that has content e.g. POST/PUT and not using chunked transfer. Is set as the "Content-Length" header. Set to size_t.max to reset to chunked transfer.

@property void authenticationMethod(AuthMethod authMethod);

Authentication method as specified in AuthMethod.

@property void maxRedirects(uint maxRedirs);

Set max allowed redirections using the location header. uint.max for infinite.

enum Method;

The standard HTTP methods : RFC2616 Section 5.1.1

head
get
post
put
del
options
trace
connect

struct StatusLine;

HTTP status line ie. the first line returned in an HTTP response.

If authentication or redirections are done then the status will be for the last response received.

ushort majorVersion;: Major HTTP version ie. 1 in HTTP/1.0.
ushort minorVersion;: Minor HTTP version ie. 0 in HTTP/1.0.
ushort code;: HTTP status line code e.g. 200.
string reason;: HTTP status line reason string.
@safe void reset();: Reset this status line
string toString();

struct FTP;

FTP client functionality.

See Also:
RFC959

this(const(char)[] url);

FTP access to the specified url.

void perform();

Performs the ftp request as it has been configured.

After a FTP client has been setup and possibly assigned callbacks the perform() method will start performing the actual communication with the server.

@property void url(const(char)[] url);

The URL to specify the location of the resource.

alias etc.c.curl.CurlReadFunc.pause requestPause;

Value to return from onSend/onReceive delegates in order to pause a request

alias etc.c.curl.CurlReadFunc.abort requestAbort;

Value to return from onSend delegate in order to abort a request

@property bool isStopped();

True if the instance is stopped. A stopped instance is not usable.

void shutdown();

Stop and invalidate this instance.

@property void verbose(bool on);

Set verbose. This will print request information to stderr.

@property void dataTimeout(Duration d);

Set timeout for activity on connection.

@property void operationTimeout(Duration d);

Set maximum time an operation is allowed to take. This includes dns resolution, connecting, data transfer, etc.

@property void connectTimeout(Duration d);

Set timeout for connecting.

@property void proxy(const(char)[] host);

Proxy

See:
proxy

@property void proxyPort(ushort port);

Proxy port

See:
proxy_port

alias etc.c.curl.CurlProxy CurlProxy;

Type of proxy

@property void proxyType(CurlProxy type);

Proxy type

See:
proxy_type

@property void dnsTimeout(Duration d);

DNS lookup timeout.

@property void netInterface(const(char)[] i); @property void netInterface(const(ubyte)[4LU] i); @property void netInterface(InternetAddress i);

The network interface to use in form of the the IP of the interface.

Example:

 theprotocol.netInterface = "192.168.1.32";
 theprotocol.netInterface = [ 192, 168, 1, 32 ];

See:
std.socket.InternetAddress

@property void localPort(ushort port);

Set the local outgoing port to use.

Parameters:

ushort port

the first outgoing port number to try and use

@property void localPortRange(ushort range);

Set the local outgoing port range to use. This can be used together with the localPort property.

Parameters:

ushort range

if the first port is occupied then try this many port number forwards

@property void tcpNoDelay(bool on);

Set the tcp no-delay socket option on or off.

See:
nodelay

void setAuthentication(const(char)[] username, const(char)[] password, const(char)[] domain = "");

Set the user name, password and optionally domain for authentication purposes.

Some protocols may need authentication in some cases. Use this function to provide credentials.

Parameters:

const(char)[] username	the username
const(char)[] password	the password
const(char)[] domain	used for NTLM authentication only and is set to the NTLM domain name

@property void onSend(ulong delegate(void[]) callback);

The event handler that gets called when data is needed for sending. The length of the void[] specifies the maximum number of bytes that can be sent.

@property void onReceive(ulong delegate(ubyte[]) callback);

The event handler that receives incoming data. Be sure to copy the incoming ubyte[] since it is not guaranteed to be valid after the callback returns.

Returns:
The callback returns the incoming bytes read. If not the entire array is the request will abort. The special value .pauseRequest can be returned in order to pause the current request.

@property void onProgress(int delegate(ulong dlTotal, ulong dlNow, ulong ulTotal, ulong ulNow) callback);

The event handler that gets called to inform of upload/download progress.

Parameters:

dlTotal	total bytes to download
dlNow	currently downloaded bytes
ulTotal	total bytes to upload
ulNow	currently uploaded bytes

Returns:
Return 0 from the callback to signal success, return non-zero to abort transfer

void clearCommands();

Clear all commands send to ftp server.

void addCommand(const(char)[] command);

Add a command to send to ftp server.

There is no remove command functionality. Do a clearCommands and set the needed commands instead.

Example:

 import std.net.curl;
 auto client = FTP();
 client.addCommand("RNFR my_file.txt");
 client.addCommand("RNTO my_renamed_file.txt");
 upload("my_file.txt", "ftp.digitalmars.com", client);

@property void contentLength(size_t len);

The content length in bytes of the ftp data.

struct SMTP;

Basic SMTP protocol support.

Example:

 import std.net.curl;

 // Send an email with SMTPS
 auto smtp = SMTP("smtps://smtp.gmail.com");
 smtp.setAuthentication("from.addr@gmail.com", "password");
 smtp.mailTo = ["<to.addr@gmail.com>"];
 smtp.mailFrom = "<from.addr@gmail.com>";
 smtp.message = "Example Message";
 smtp.perform();

See Also:
RFC2821

this(string url);

Sets to the URL of the SMTP server.

void perform();

Performs the request as configured.

@property void url(const(char)[] url);

The URL to specify the location of the resource.

alias etc.c.curl.CurlReadFunc.pause requestPause;

Value to return from onSend/onReceive delegates in order to pause a request

alias etc.c.curl.CurlReadFunc.abort requestAbort;

Value to return from onSend delegate in order to abort a request

@property bool isStopped();

True if the instance is stopped. A stopped instance is not usable.

void shutdown();

Stop and invalidate this instance.

@property void verbose(bool on);

Set verbose. This will print request information to stderr.

@property void dataTimeout(Duration d);

Set timeout for activity on connection.

@property void operationTimeout(Duration d);

Set maximum time an operation is allowed to take. This includes dns resolution, connecting, data transfer, etc.

@property void connectTimeout(Duration d);

Set timeout for connecting.

@property void proxy(const(char)[] host);

Proxy

See:
proxy

@property void proxyPort(ushort port);

Proxy port

See:
proxy_port

alias etc.c.curl.CurlProxy CurlProxy;

Type of proxy

@property void proxyType(CurlProxy type);

Proxy type

See:
proxy_type

@property void dnsTimeout(Duration d);

DNS lookup timeout.

@property void netInterface(const(char)[] i); @property void netInterface(const(ubyte)[4LU] i); @property void netInterface(InternetAddress i);

The network interface to use in form of the the IP of the interface.

Example:

 theprotocol.netInterface = "192.168.1.32";
 theprotocol.netInterface = [ 192, 168, 1, 32 ];

See:
std.socket.InternetAddress

@property void localPort(ushort port);

Set the local outgoing port to use.

Parameters:

ushort port

the first outgoing port number to try and use

@property void localPortRange(ushort range);

Set the local outgoing port range to use. This can be used together with the localPort property.

Parameters:

ushort range

if the first port is occupied then try this many port number forwards

@property void tcpNoDelay(bool on);

Set the tcp no-delay socket option on or off.

See:
nodelay

void setAuthentication(const(char)[] username, const(char)[] password, const(char)[] domain = "");

Set the user name, password and optionally domain for authentication purposes.

Some protocols may need authentication in some cases. Use this function to provide credentials.

Parameters:

const(char)[] username	the username
const(char)[] password	the password
const(char)[] domain	used for NTLM authentication only and is set to the NTLM domain name

@property void onSend(ulong delegate(void[]) callback);

The event handler that gets called when data is needed for sending. The length of the void[] specifies the maximum number of bytes that can be sent.

@property void onReceive(ulong delegate(ubyte[]) callback);

The event handler that receives incoming data. Be sure to copy the incoming ubyte[] since it is not guaranteed to be valid after the callback returns.

Returns:
The callback returns the incoming bytes read. If not the entire array is the request will abort. The special value .pauseRequest can be returned in order to pause the current request.

@property void onProgress(int delegate(ulong dlTotal, ulong dlNow, ulong ulTotal, ulong ulNow) callback);

The event handler that gets called to inform of upload/download progress.

Parameters:

dlTotal	total bytes to download
dlNow	currently downloaded bytes
ulTotal	total bytes to upload
ulNow	currently uploaded bytes

Returns:
Return 0 from the callback to signal success, return non-zero to abort transfer

void mailFrom()(const(char)[] sender);

Setter for the sender's email address.

void mailTo()(const(char)[][] recipients...);

Setter for the recipient email addresses.

@property void message(string msg);

Sets the message body text.

class CurlException: object.Exception;

Exception thrown on errors in std.net.curl functions.

this(string msg, string file = __FILE__, size_t line = __LINE__, Throwable next = null);

Parameters:

string msg	The message for the exception.
string file	The file where the exception occurred.
size_t line	The line number where the exception occurred.
Throwable next	The previous exception in the chain of exceptions, if any.

class CurlTimeoutException: std.net.curl.CurlException;

Exception thrown on timeout errors in std.net.curl functions.

this(string msg, string file = __FILE__, size_t line = __LINE__, Throwable next = null);

Parameters:

string msg	The message for the exception.
string file	The file where the exception occurred.
size_t line	The line number where the exception occurred.
Throwable next	The previous exception in the chain of exceptions, if any.

alias int CurlCode;

Equal to etc.c.curl.CURLcode

struct Curl;

Wrapper to provide a better interface to libcurl than using the plain C API. It is recommended to use the HTTP/FTP etc. structs instead unless raw access to libcurl is needed.

void initialize();

Initialize the instance by creating a working curl handle.

Curl dup();

Duplicate this handle.

The new handle will have all options set as the one it was duplicated from. An exception to this is that all options that cannot be shared across threads are reset thereby making it safe to use the duplicate in a new thread.

void shutdown();

Stop and invalidate this curl instance.

Warning:
Do not call this from inside a callback handler e.g. onReceive.

void pause(bool sendingPaused, bool receivingPaused);

Pausing and continuing transfers.

void set(CurlOption option, const(char)[] value);

Set a string curl option.

Parameters:

CurlOption option	A etc.c.curl.CurlOption as found in the curl documentation
const(char)[] value	The string

void set(CurlOption option, long value);

Set a long curl option.

Parameters:

CurlOption option	A etc.c.curl.CurlOption as found in the curl documentation
long value	The long

void set(CurlOption option, void* value);

Set a void* curl option.

Parameters:

CurlOption option	A etc.c.curl.CurlOption as found in the curl documentation
void* value	The pointer

void clear(CurlOption option);

Clear a pointer option.

Parameters:

CurlOption option

A etc.c.curl.CurlOption as found in the curl documentation

CurlCode perform(bool throwOnError = true);

perform the curl request by doing the HTTP,FTP etc. as it has been setup beforehand.

@property void onReceive(ulong delegate(ubyte[]) callback);

The event handler that receives incoming data.

Parameters:

ulong delegate(ubyte[]) callback

the callback that receives the ubyte[] data. Be sure to copy the incoming data and not store a slice.

Returns:
The callback returns the incoming bytes read. If not the entire array is the request will abort. The special value HTTP.pauseRequest can be returned in order to pause the current request.

Example:

 import std.net.curl, std.stdio;
 Curl curl;
 curl.initialize();
 curl.set(CurlOption.url, "http://dlang.org");
 curl.onReceive = (ubyte[] data) { writeln("Got data", to!(const(char)[])(data)); return data.length;};
 curl.perform();

@property void onReceiveHeader(void delegate(const(char[])) callback);

The event handler that receives incoming headers for protocols that uses headers.

Parameters:

void delegate(const(char[])) callback

the callback that receives the header string. Make sure the callback copies the incoming params if it needs to store it because they are references into the backend and may very likely change.

Example:

 import std.net.curl, std.stdio;
 Curl curl;
 curl.initialize();
 curl.set(CurlOption.url, "http://dlang.org");
 curl.onReceiveHeader = (in char[] header) { writeln(header); };
 curl.perform();

@property void onSend(ulong delegate(void[]) callback);

The event handler that gets called when data is needed for sending.

Parameters:

ulong delegate(void[]) callback

the callback that has a void[] buffer to be filled

Returns:
The callback returns the number of elements in the buffer that have been filled and are ready to send. The special value Curl.abortRequest can be returned in order to abort the current request. The special value Curl.pauseRequest can be returned in order to pause the current request.

Example:

 import std.net.curl;
 Curl curl;
 curl.initialize();
 curl.set(CurlOption.url, "http://dlang.org");

 string msg = "Hello world";
 curl.onSend = (void[] data)
 {
     auto m = cast(void[])msg;
     size_t length = m.length > data.length ? data.length : m.length;
     if (length == 0) return 0;
     data[0..length] = m[0..length];
     msg = msg[length..$];
     return length;
 };
 curl.perform();

@property void onSeek(CurlSeek delegate(long, CurlSeekPos) callback);

The event handler that gets called when the curl backend needs to seek the data to be sent.

Parameters:

CurlSeek delegate(long, CurlSeekPos) callback

the callback that receives a seek offset and a seek position etc.c.curl.CurlSeekPos

Returns:
The callback returns the success state of the seeking etc.c.curl.CurlSeek

Example:

 import std.net.curl;
 Curl curl;
 curl.initialize();
 curl.set(CurlOption.url, "http://dlang.org");
 curl.onSeek = (long p, CurlSeekPos sp)
 {
     return CurlSeek.cantseek;
 };
 curl.perform();

@property void onSocketOption(int delegate(socket_t, CurlSockType) callback);

The event handler that gets called when the net socket has been created but a connect() call has not yet been done. This makes it possible to set misc. socket options.

Parameters:

int delegate(socket_t, CurlSockType) callback

the callback that receives the socket and socket type etc.c.curl.CurlSockType

Returns:
Return 0 from the callback to signal success, return 1 to signal error and make curl close the socket

Example:

 import std.net.curl;
 Curl curl;
 curl.initialize();
 curl.set(CurlOption.url, "http://dlang.org");
 curl.onSocketOption = delegate int(curl_socket_t s, CurlSockType t) { /+ do stuff +/ };
 curl.perform();

@property void onProgress(int delegate(ulong dlTotal, ulong dlNow, ulong ulTotal, ulong ulNow) callback);

The event handler that gets called to inform of upload/download progress.

Parameters:

int delegate(ulong dlTotal, ulong dlNow, ulong ulTotal, ulong ulNow) callback

the callback that receives the (total bytes to download, currently downloaded bytes, total bytes to upload, currently uploaded bytes).

Returns:
Return 0 from the callback to signal success, return non-zero to abort transfer

Example:

 import std.net.curl;
 Curl curl;
 curl.initialize();
 curl.set(CurlOption.url, "http://dlang.org");
 curl.onProgress = delegate int(size_t dltotal, size_t dlnow, size_t ultotal, size_t uln)
 {
     writeln("Progress: downloaded bytes ", dlnow, " of ", dltotal);
     writeln("Progress: uploaded bytes ", ulnow, " of ", ultotal);
     curl.perform();
 };

std

etc

core

std.net.curl