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yada 2019-06-08
OliverM 2019-06-08T19:26:03.004100Z
How do I save a file uploaded via POST and multipart/form-data? For example, the following resource reports an error:
(resource
{:methods {:post {:consumes "multipart/form-data"
:parameters {:form {:photo java.io.File}}
:response
(fn [ctx]
(let [photo (-> ctx :parameters :form :photo)]
(->> "photo.jpg"
(io/file "resources" "passengers")
(io/copy photo))))}}})
Bad form fields
{:status 400,
:error
{:photo (not (instance? java.io.File a-yada.multipart.DefaultPart))}}
io is an alias for io/writer inside a with-open clause but got No matching method found: write for class java.io.BufferedWriter errors, so tried io/copy instead to see what that would show up.
How do I use the multipart data? I see there’s a process-request-body method implementation for multi-part bodies in yada.multipart but I’ve no idea how to invoke it (or why isn’t it being invoked on my behalf by yada when it sees the content type?)OliverM 2019-06-08T20:03:17.004400Z
If I follow an example I found and implement a :consumer entry on the resource, the file of the correct size is created, but it’s not parseable as an image (I’m uploading a jpg and giving it that file extension):
:consumer (fn [ctx _ body-stream]
(let [file (io/file "resources" "passengers" "photo.jpg"))]
(yada.consume/save-to-file ctx body-stream file)))
OliverM 2019-06-09T13:15:28.004900Z
Setting the content-type to application/octet-stream instead works fine, but it’d be great to know what I was doing wrong with the mulitpart/form-data content-type payload (if only so I can POST forms that include photos or other binary payloads in the future)