Reference THttpClient

  THttpClient = class
  protected
    { Complete is invoked when Process is about to return true }
    procedure Complete; virtual;
    { Invoke the OnCancel event }
    procedure DoCancel; virtual;
    { Invoke the OnHeaderComplete event }
    procedure DoHeaderComplete; virtual;
    { Invoke the OnResponseComplete event }
    procedure DoComplete; virtual;
    { Invoke the OnProgress event }
    procedure DoProgress(const Size, Transmitted: LargeWord); virtual;
  public
    { Create an http client instance }
    constructor Create;
    destructor Destroy; override;
    { Clear the last response }
    procedure Clear;
    { Cancel an ongoing response, can be invoked automatically when an
      unexpected condition is encountered }
    procedure Cancel;
    { Request a copy of the response header }
    procedure CopyHeader(out Header: THttpResponseHeader);
    { Send an HTTP GET request }
    function Get(const Url: TUrl): Boolean; overload;
    { Send an HTTP GET request with custom headers }
    function Get(const Url: TUrl; const Headers: TNamedStrings): Boolean; overload;
    { Send an HTTP POST request with custom headers and content }
    function Post(const Url: TUrl; const Headers: TNamedStrings; const ContentType: string; const Content: string): Boolean;
    { Send an HTTP POST request with an arguments form body }
    function PostArgs(const Url: TUrl; const Args: TNamedStrings): Boolean;
    { Send an HTTP POST request with a json body }
    function PostJson(const Url: TUrl; const Json: string): Boolean;
    { Send an HTTP POST request with an xml body }
    function PostXml(const Url: TUrl; const Xml: string): Boolean;
    { Optional size in bytes of the response buffer }
    property BufferSize: Integer read FBufferSize write FBufferSize;
    { Holds true if the last request completed properly }
    property Completed: Boolean read FCompleted;
    { The user agent as seen by the server }
    property UserAgent: string read FUserAgent write FUserAgent;
    { The response code returned from the server }
    property Code: Integer read GetCode;
    { The response status returned from the server }
    property Status: string read GetStatus;
    { Response header names }
    property Names[Index: Integer]: string read GetName;
    { Response header values }
    property Values[Name: string]: string read GetValue;
    { Response header name count }
    property NameCount: Integer read GetNameCount;
    { Set ResponseStream to write the response body to a stream }
    property ResponseStream: TStream read FResponseStream write FResponseStream;
    { If ResponseStream is nil then the response body is stored in ResponseText
      instead }
    property ResponseText: string read GetResponseText;
    { OnCancel is invoked if the request is stopped before completion }
    property OnCancel: TNotifyEvent read FFOnCancel write FFOnCancel;
    { OnHeaderComplete is invoked after a complete response header is read }
    property OnHeaderComplete: TTransmistHeaderCompleteEvent read FOnHeaderComplete write FOnHeaderComplete;
    { OnProgress is invoked after the response header is received while bytes
      are being read }
    property OnProgress: TTransmitEvent read FOnProgress write FOnProgress;
    { OnComplete is invoked after a response is read in its entirety }
    property OnComplete: TNotifyEvent read FOnComplete write FOnComplete;
  end;