4
$\begingroup$

I want to call this Picture bed API to upload my picture and return its link.I have translated the official instructional the page into English.And there is a example succeed to use it with Python. I want to use it in Mathematica also, but the parameter (smfile) seem is Python image object.Such as following try.So how to make it?The img in code is

http://o8aucf9ny.bkt.clouddn.com/2016-10-14-17-53-00.png

Try one:

URLExecute["https://sm.ms/api/upload", <|"Method" -> "POST", 
  "smfile" -> img|>]

Try two:

URLExecute["https://sm.ms/api/upload", <|"Method" -> "POST", 
  "smfile" -> 
   FromCharacterCode[ToCharacterCode[ImageData[img], "UTF-8"], 
    "Unicode"]|>]

I think the key of failure is that "smfile" should be a Python object but not a common Mathematica expression or maybe there are other workaround can do this.

| improve this question | |
$\endgroup$
  • $\begingroup$ Please make this question self contained. Include your mma code and explanation what is going wrong. $\endgroup$ – Kuba♦ Oct 14 '16 at 9:17
  • $\begingroup$ "smfile is a Python image object" -- the docs suggest it a normal PNG file. Have you tried the method in the post that you commented on (mathematica.stackexchange.com/a/97658/1043)? $\endgroup$ – ZachB Oct 14 '16 at 17:25
  • $\begingroup$ @ZachB Yes,I have noted that post and give some try,but I am lack of this area knowledge.I don't know how to do it still. $\endgroup$ – yode Oct 14 '16 at 17:30
5
$\begingroup$

Using URLFetch[]:

smmsUpload[img_, detailed : (True | False) : False] := Module[{raw}, 
    raw = ImportString[URLFetch["https://sm.ms/api/upload", Method -> "POST", 
                                "MultipartElements" -> {{"smfile\"; filename=\"tmp.png", 
                                "image/png"} -> ExportString[img, "PNG"]}], "RawJSON"];
    If[raw === $Failed || Lookup[raw, "code", "error"] =!= "success",
       Echo[raw["msg"]]; Return[$Failed]];
    If[! detailed, raw["data", "url"],
       Grid[Transpose[{{"Dimensions:", "Hash:", "Image Link:", "Delete Link:"}, 
                       MapAt[Hyperlink, FlattenAt[TakeDrop[
                       Lookup[raw["data"], {"width", "height", "hash", "url", "delete"}],
                              2], 2], {{3}, {4}}]}], Alignment -> Left]]]

smmsUpload[ExampleData[{"AerialImage", "Pentagon"}], True]

result

I couldn't get URLRead[]/URLExecute[] to work, so I'll leave that for somebody else to do.

| improve this answer | |
$\endgroup$
  • $\begingroup$ That If scare me, actually this answer is what I want exactly which can upload a image produced compute.Thanks very much,maybe you can change the URLFetch to URLRead enlightened by SqRoots's answer. $\endgroup$ – yode Oct 15 '16 at 8:24
  • $\begingroup$ As your answer,I think HTTPRequest["https://sm.ms/api/upload",<|Method -> "POST","Body"->{"smfile"-><|"Content" -> ExportString[img,"PNG"],"MIMEType" -> "image/png","filename" -> "tmp.png"|>}|>] should work,but I don't know what happen. $\endgroup$ – yode Oct 15 '16 at 8:50
  • $\begingroup$ Did you try your proposal already if it works? $\endgroup$ – J. M.'s technical difficulties♦ Oct 15 '16 at 9:08
  • $\begingroup$ That work,Would you mind update your answer? $\endgroup$ – yode Oct 16 '16 at 3:05
3
$\begingroup$

In Mma 11, you can use this function URLRead[].

e.g.

image = "E:/yourPic.jpg";(*Your Picture*)
url = "https://sm.ms/api/upload";(*Picture Bed URL*)
req = HTTPRequest[url, <|"Body" -> {"smfile" -> <|"Content" -> File[image], 
    "Name" -> FileNameTake[image]|>}|>];(*Upload Request, the "Name" is unnecessary*)
res = URLRead[req, "Body"];(*Upload, return JSON String*)
assoc = ImportString[res, "RawJSON"](*convert to Association*)

Then, assoc is what you want.

  • URL: assoc["data"]["url"]
  • delete: ImportString[URLRead[assoc["data"]["delete"], "Body"]]
  • size: assoc["data"]["size"]
  • width: assoc["data"]["width"]
  • height: assoc["data"]["height"]
| improve this answer | |
$\endgroup$
  • $\begingroup$ "Name" is certainly unnecessary if the image is coming from a file, but what would you propose if the image is already in Mathematica? Exporting it as a file just to upload it seems wasteful... $\endgroup$ – J. M.'s technical difficulties♦ Oct 15 '16 at 8:59
  • $\begingroup$ I think it is wasteful for I/O, but not to much for CPU. yode's way works, and not need export. $\endgroup$ – Li Xuan Oct 16 '16 at 2:24

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.