Loading...
Searching...
No Matches
An InputStream which can be used to read from a given URL. More...
#include <juce_WebInputStream.h>
Classes | |
| class | Listener |
| Used to receive callbacks for POST data send progress. More... | |
Public Member Functions | |
| WebInputStream (const URL &url, bool addParametersToRequestBody) | |
| Creates a new WebInputStream which can be used to read from a URL. | |
| ~WebInputStream () override | |
| Destructor. | |
| WebInputStream & | withExtraHeaders (const String &extraHeaders) |
| Add extra headers to the HTTP request. | |
| WebInputStream & | withCustomRequestCommand (const String &customRequestCommand) |
| Override the HTTP command that is sent. | |
| WebInputStream & | withConnectionTimeout (int timeoutInMs) |
| Specify the connection time-out. | |
| WebInputStream & | withNumRedirectsToFollow (int numRedirects) |
| Specify the number of redirects to be followed. | |
| bool | connect (Listener *listener) |
| Wait until the first byte is ready for reading. | |
| bool | isError () const |
| Returns true if there was an error during the connection attempt. | |
| void | cancel () |
| Will cancel a blocking read and prevent any subsequent connection attempts. | |
| StringPairArray | getRequestHeaders () const |
| Returns a StringPairArray of the request headers. | |
| StringPairArray | getResponseHeaders () |
| Returns a StringPairArray of response headers. | |
| int | getStatusCode () |
| Returns the status code returned by the HTTP server. | |
| int64 | getTotalLength () override |
| Returns the total number of bytes available for reading in this stream. | |
| int | read (void *destBuffer, int maxBytesToRead) override |
| Reads some data from the stream into a memory buffer. | |
| bool | isExhausted () override |
| Returns true if the stream has no more data to read. | |
| int64 | getPosition () override |
| Returns the offset of the next byte that will be read from the stream. | |
| bool | setPosition (int64 wantedPos) override |
| Tries to move the current read position of the stream. | |
 Public Member Functions inherited from InputStream | |
| virtual | ~InputStream ()=default |
| Destructor. | |
| int64 | getNumBytesRemaining () |
| Returns the number of bytes available for reading, or a negative value if the remaining length is not known. | |
| ssize_t | read (void *destBuffer, size_t maxBytesToRead) |
| virtual char | readByte () |
| Reads a byte from the stream. | |
| virtual bool | readBool () |
| Reads a boolean from the stream. | |
| virtual short | readShort () |
| Reads two bytes from the stream as a little-endian 16-bit value. | |
| virtual short | readShortBigEndian () |
| Reads two bytes from the stream as a little-endian 16-bit value. | |
| virtual int | readInt () |
| Reads four bytes from the stream as a little-endian 32-bit value. | |
| virtual int | readIntBigEndian () |
| Reads four bytes from the stream as a big-endian 32-bit value. | |
| virtual int64 | readInt64 () |
| Reads eight bytes from the stream as a little-endian 64-bit value. | |
| virtual int64 | readInt64BigEndian () |
| Reads eight bytes from the stream as a big-endian 64-bit value. | |
| virtual float | readFloat () |
| Reads four bytes as a 32-bit floating point value. | |
| virtual float | readFloatBigEndian () |
| Reads four bytes as a 32-bit floating point value. | |
| virtual double | readDouble () |
| Reads eight bytes as a 64-bit floating point value. | |
| virtual double | readDoubleBigEndian () |
| Reads eight bytes as a 64-bit floating point value. | |
| virtual int | readCompressedInt () |
| Reads an encoded 32-bit number from the stream using a space-saving compressed format. | |
| virtual String | readNextLine () |
| Reads a UTF-8 string from the stream, up to the next linefeed or carriage return. | |
| virtual String | readString () |
| Reads a zero-terminated UTF-8 string from the stream. | |
| virtual String | readEntireStreamAsString () |
| Tries to read the whole stream and turn it into a string. | |
| virtual size_t | readIntoMemoryBlock (MemoryBlock &destBlock, ssize_t maxNumBytesToRead=-1) |
| Reads from the stream and appends the data to a MemoryBlock. | |
| virtual void | skipNextBytes (int64 numBytesToSkip) |
| Reads and discards a number of bytes from the stream. | |
Additional Inherited Members | |
| Protected Member Functions inherited from InputStream | |
| InputStream ()=default | |
An InputStream which can be used to read from a given URL.
| WebInputStream::WebInputStream | ( | const URL & | url, |
| bool | addParametersToRequestBody ) |
Creates a new WebInputStream which can be used to read from a URL.
| url | the URL that should be retrieved. This parameter may also contain POST data and/or parameters. |
| addParametersToRequestBody | specifies whether any URL parameters that have been set will be transferred via the request body data or added to the URL address. This will also determine whether a POST or GET command will be used if a custom command is not set. |
|
override |
Destructor.
| WebInputStream & WebInputStream::withExtraHeaders | ( | const String & | extraHeaders | ) |
Add extra headers to the HTTP request.
Returns a reference to itself so that several methods can be chained.
| extraHeaders | this string is appended onto the headers that are used for the request. It must therefore be a valid set of HTML header directives, separated by newlines. |
| WebInputStream & WebInputStream::withCustomRequestCommand | ( | const String & | customRequestCommand | ) |
Override the HTTP command that is sent.
Returns a reference to itself so that several methods can be chained.
Note that this command will not change the way parameters are sent. This must be specified in the constructor.
| customRequestCommand | this string is the custom HTTP request command such as POST or GET. |
| WebInputStream & WebInputStream::withConnectionTimeout | ( | int | timeoutInMs | ) |
Specify the connection time-out.
Returns a reference to itself so that several methods can be chained.
| timeoutInMs | the number of milliseconds to wait until the connection request is aborted. |
| WebInputStream & WebInputStream::withNumRedirectsToFollow | ( | int | numRedirects | ) |
Specify the number of redirects to be followed.
Returns a reference to itself so that several methods can be chained.
| numRedirects | specifies the number of redirects that will be followed before returning a response (ignored for Android which follows up to 5 redirects) |
| bool WebInputStream::connect | ( | Listener * | listener | ) |
Wait until the first byte is ready for reading.
This method will attempt to connect to the URL given in the constructor and block until the status code and all response headers have been received or an error has occurred.
Note that most methods will call connect() internally if they are called without an established connection. Therefore, it is not necessary to explicitly call connect unless you would like to use a custom listener.
After a successful call to connect(), getResponseHeaders(), getTotalLength() and getStatusCode() will all be non-blocking.
| listener | a listener to receive progress callbacks on the status of a POST data upload. |
| bool WebInputStream::isError | ( | ) | const |
Returns true if there was an error during the connection attempt.
| void WebInputStream::cancel | ( | ) |
Will cancel a blocking read and prevent any subsequent connection attempts.
| StringPairArray WebInputStream::getRequestHeaders | ( | ) | const |
Returns a StringPairArray of the request headers.
| StringPairArray WebInputStream::getResponseHeaders | ( | ) |
Returns a StringPairArray of response headers.
If getResponseHeaders() is called without an established connection, then getResponseHeaders() will call connect internally and block until connect returns - either due to a successful connection or a connection error.
| int WebInputStream::getStatusCode | ( | ) |
Returns the status code returned by the HTTP server.
If getStatusCode() is called without an established connection, then getStatusCode() will call connect internally and block until connect returns - either due to a successful connection or a connection error.
|
overridevirtual |
Returns the total number of bytes available for reading in this stream.
Note that this is the number of bytes available from the start of the stream, not from the current position.
If getTotalLength() is called without an established connection, then getTotalLength() will call connect internally and block until connect returns - either due to a successful connection or a connection error.
If the size of the stream isn't actually known, this will return -1.
Implements InputStream.
|
overridevirtual |
Reads some data from the stream into a memory buffer.
This method will block until the maxBytesToRead bytes are available.
This method calls connect() internally if the connection hasn't already been established.
| destBuffer | the destination buffer for the data. This must not be null. |
| maxBytesToRead | the maximum number of bytes to read - make sure the memory block passed in is big enough to contain this many bytes. This value must not be negative. |
Implements InputStream.
|
overridevirtual |
Returns true if the stream has no more data to read.
Implements InputStream.
|
overridevirtual |
Returns the offset of the next byte that will be read from the stream.
Implements InputStream.
|
overridevirtual |
Tries to move the current read position of the stream.
The position is an absolute number of bytes from the stream's start.
For a WebInputStream, this method will fail if wantedPos is smaller than the current position. If wantedPos is greater than the current position, then calling setPosition() is the same as calling read(), i.e. the skipped data will still be downloaded, although skipped bytes will be discarded immediately.
Implements InputStream.
