If you JSON export an association with a url, it will espace the forward slashes like this:

ExportString[ <|"url" -> "http://s2d3.scene1.com/medium/94760712386071_001.jpg"|>, 

enter image description here

How can I get this not to happen?

  • $\begingroup$ So // StringReplace["\\/" -> "/"] is not an option? $\endgroup$ – Kuba Feb 4 '19 at 21:41
  • 1
    $\begingroup$ In practice, it would be during a call to Export not ExportString and only a few of the fields are URLs (don't want to un-escape all of them). $\endgroup$ – M.R. Feb 4 '19 at 22:40
  • $\begingroup$ @kuba Are you saying do this: Export["~/Downloads/tmp.json", ExportString[<|"a" -> "http://a.b/c:de", "b" -> 123, "c" -> <|"url" -> "http://s2d3.scene1.com/medium/94760712386071_001.jpg"|>|>, "JSON"] // StringReplace["\\/" -> "/"], "Text"] $\endgroup$ – M.R. Feb 4 '19 at 22:59
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    $\begingroup$ I think you need to export as "String" not "Text" to not double encode. It may not matter here but unless I am mistaken, it should be "String". $\endgroup$ – Kuba Feb 4 '19 at 23:01
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    $\begingroup$ There's no way to do this from JSON Export directly (even in any undocumented way), some kind of StringReplace on ExportString and Exporting as "String" like @Kuba has recommended would be the best solution most likely. $\endgroup$ – GenericAccountName Feb 5 '19 at 0:45

Don't know if there is a neat solution but here is one approach. Assuming you can mark your urls with URL:

json = <|"url" -> URL @ "http://s2d3.scene1.com/medium/94760712386071_001.jpg"
  , "urlω2" -> URL@"http://wolfram.com"

FileTemplateApply[#, #2[[1]], "file.json"] & @@ 
Reap @ 
, "RawJSON"
,  "ConversionFunction" -> Function[Sow[First@#]; "``"]

Import["file.json", "RawJSON"]

{ "url":"http://s2d3.scene1.com/medium/94760712386071_001.jpg", "urlÏ2":"http://wolfram.com" }

<|"url" -> "http://s2d3.scene1.com/medium/94760712386071_001.jpg",  
    "urlω2" -> "http://wolfram.com"|>

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