Implements support for MIME-like multipart form responses.

TIdMultiPartFormDataStream = class(TStream)

TIdMultiPartFormDataStream is a TStream descendant that implements support for encapsulation of MIME-like "multipart" types in the content of an HTTP message body, as described in the Internet Standards document:

• RFC 1867 - Form-based File Upload in HTML (http://www.rfc-editor.org/rfc/rfc1867.txt)

TIdMultiPartFormDataStream is oriented towards handling HTTP messages specifically defined to carry HTML FORM data suitable for processing via the POST request method. TIdMultiPartFormDataStream includes support for uniformly representing both field and file upload requests, and a MIME compatible representation for field and file upload responses.

Multipart form content for the stream can include values for the HTML INPUT types:

• CHECKBOX

• HIDDEN

• IMAGE

• PASSWORD

• RADIO

• RESET

• SUBMIT

• TEXT

• FILE

TIdMultiPartFormDataStream utilizes the MIME media type "multipart/form-data" to specify the content-type for values in the HTTP message sent from a client to a server. Note: The content-type "multipart/mixed" may be used when multiple files are included the multipart response.

TIdMultiPartFormDataStream is used in the overloaded TIdHTTP.Post method when sending a "multipart/form-data" request to an HTTP server.

property Boundary: string;

Boundary

property RequestContentType: string;

RequestContentType

procedure AddFile(const AFieldName: string; const AFileName: string; const AContentType: string);

AddFile

procedure AddFormField(const AFieldName: string; const AFieldValue: string);

AddFormField

procedure AddObject(const AFieldName: string; const AContentType: string; AFileData: TObject; const AFileName: string = '');

AddObject

constructor Create;

Create

destructor Destroy; override;

Destroy

function Read(var Buffer; Count: Longint): Longint; override;

Read

function Seek(Offset: Longint; Origin: Word): Longint; override; overload;

Seek

function Write(const Buffer; Count: Longint): Longint; override;

Write