> On 27 Apr 2017, at 14:57, Juraj Kubelka <juraj.kube...@icloud.com> wrote: > > Hi, > > That’s great! Thank you a lot for the information :-)
Well, it is Peter who came up with the alternative request. All credit to him. > Juraj > >> On Apr 27, 2017, at 09:52, Sven Van Caekenberghe <s...@stfx.eu> wrote: >> >> >>> On 26 Apr 2017, at 17:21, Peter Uhnak <i.uh...@gmail.com> wrote: >>> >>> Maybe the content is not properly stored in the JSON on github' side? But >>> you can use base64 in `accept:` to make it work. >>> >>> json := STONJSON fromString: (ZnClient new >>> url: 'https://api.github.com/gists/5503544'; >>> accept: 'application/vnd.github.v3.base64+json'; >>> get). >>> b64 := ((json at: 'files') at: 'thumbnail.png') at: 'content'. >>> PNGReadWriter formFromStream: (Base64MimeConverter mimeDecodeToBytes: >>> content readStream). >> >> Ah, great that you found a way to force the server to send the data in a >> more sensible way ! >> >> Using the latest code from Zn & NeoJSON, combining with another recent >> thread (accessing nested dictionaries), this could be written as: >> >> json := NeoJSONObject fromString: (ZnClient new >> url: 'https://api.github.com/gists/5503544'; >> accept: 'application/vnd.github.v3.base64+json'; >> get). >> b64 := json atPath: #('files' 'thumbnail.png' 'content'). >> PNGReadWriter formFromStream: (ZnBase64Encoder new decode: b64) readStream. >> >> Sven >> >>> Peter >>> >>> >>> On Wed, Apr 26, 2017 at 04:50:04PM +0200, Sven Van Caekenberghe wrote: >>>> I am puzzled by how they actually encoded the PNG as a String, I tried a >>>> couple of alternatives but I could not get binary data out of it so that >>>> it parsed successfully as PNG. >>>> >>>> If I would have to encode binary data in JSON I would use Base64 encoding >>>> (but alternatives exist). >>>> >>>>> On 24 Apr 2017, at 20:36, Juraj Kubelka <juraj.kube...@icloud.com> wrote: >>>>> >>>>> Hi, >>>>> >>>>> I was playing with GitHub Gist API and I have queried the following Gist: >>>>> https://gist.github.com/mbostock/5503544 >>>>> I was interested how the PNG image is returned: >>>>> https://gist.github.com/mbostock/5503544#file-thumbnail-png >>>>> >>>>> I can obtain the whole Gist executing: >>>>> >>>>> STONJSON fromString: >>>>> (ZnClient new >>>>> url: 'https://api.github.com/gists/5503544'; >>>>> accept: 'application/vnd.github.v3+json'; >>>>> get). >>>>> >>>>> I can get PNG contents executing: >>>>> >>>>> pngData := (ZnEasy get: >>>>> ((((STONJSON fromString: >>>>> (ZnClient new >>>>> url: 'https://api.github.com/gists/5503544'; >>>>> accept: 'application/vnd.github.v3+json'; >>>>> get)) at: 'files') at: 'thumbnail.png') at: 'raw_url')) >>>>> contents. >>>>> PNGReadWriter formFromStream: rawPng readStream. >>>>> >>>>> But the PNG image is part of the Gist query and can be retrieved by: >>>>> >>>>> pngContent := ((((STONJSON fromString: >>>>> (ZnClient new >>>>> url: 'https://api.github.com/gists/5503544'; >>>>> accept: 'application/vnd.github.v3+json'; >>>>> get)) at: 'files') at: 'thumbnail.png') at: 'content'). >>>>> >>>>> "As pngContent is a WideString, I cannot use:" >>>>> PNGReadWriter formFromStream: pngContent readStream. >>>>> >>>>> How can I read the PNG image from the pngContent? Any idea? >>>>> And the reverse question: How can I send the PNG bytes using JSON format? >>>>> >>>>> Thanks! >>>>> Juraj >>>>> >>>> >>>> >>> >> >> > >
