This example reads an image as a binary file and creates an 8-bit unsigned integer array from the raw bytes. Note that this will not decode the image and read the pixels. You will need a png decoding library for that. An alternative to the above method utilizes the Blob interface to directly construct a Blob with the arraybuffer data.
The example above fetches the byte at offset x within the loaded binary data. The valid range for x is from 0 to filestream. See also downloading files. The following example sends creates a text file on-the-fly and uses the POST method to send the "file" to the server.
Please, read this paragraph. Line 4 sets the Content-Length header toindicating that the data is bytes long. Obviously you need to change this value based on the actual size of the data being sent. You can also send binary content by passing an instance of the nsIFileInputStream to send.
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