Question

Okay, this should be simple, but I just can’t get it to work. I have an array of bytes, read from a png file. I’m trying to write a (very) simple HttpHandler to render the image:

context.Response.AddHeader("Content-Type", "image/png")
context.Response.BinaryWrite(bytes)
context.Response.End()

When I open the page in a browser, I just get gibberish,

�PNG IHDR���X��sRGB���gAMA�� �a pHYs���o�d` …

It’s obviously something with the header information I’m doing wrong. Any suggestions?

Answer 1

Try using the ContentType property instead of AddHeader:

context.Response.ContentType = "image/png";
...

Two more diagnostics:

• If you use “save” in the browser and save it to a png file, does that render properly?
• Use Wireshark to see what’s really coming back in the response (which exact bytes etc)