It can be a pain to return json-responses from a Function App, when you also want the proper Content-Type HTTP header to be returned, which it of course should.<\/p>\n
If you do it the straight-forward way (works the same with OkObjectResult) –<\/p>\n
return new BadRequestObjectResult(jsonResponse);<\/pre>\nif response contains a json string, it will be returned ok, but the Content-Type will be “text\/plain”<\/p>\n
BadRequestObjectResult resp = new BadRequestObjectResult(jsonResponse);\r\nresp.ContentTypes.Add(MediaTypeHeaderValue.Parse(\"application\/json\"));\r\nresp.Value = jsonResponse;\r\nreturn resp;<\/pre>\nif response contains a json string, the special characters (like “) will be escaped, and it will no longer return valid json, but the Content-Type is ok (application\/json)<\/p>\n
If the content-type is not set in above example, the special characters are not escaped<\/p>\n
<\/p>\n
If you return a JsonResult as suggested in some places, the ContentType will be correct, but the Json will be escaped.<\/p>\n
return new JsonResult(jsonResponse);<\/pre>\nMake a class like this<\/p>\n
using System.Text.Json;\r\nusing Microsoft.AspNetCore.Mvc;\r\n\r\nnamespace Azure.Function.Returning.Json.Response {\r\n public class CustomJsonResult : ContentResult {\r\n private const string ContentTypeApplicationJson = \"application\/json\";\r\n\r\n public CustomJsonResult(object p_value, JsonSerializerOptions p_options = null, int p_statusCode = 200) {\r\n ContentType = ContentTypeApplicationJson;\r\n Content = p_options == null ? JsonSerializer.Serialize(p_value) : JsonSerializer.Serialize(p_value, p_options);\r\n StatusCode = p_statusCode;\r\n }\r\n }\r\n}<\/pre>\nand return response like<\/p>\n
return new CustomJsonResult(jsonResponse, new JsonSerializerOptions { PropertyNamingPolicy = null }, 400);<\/pre>\nThis way, correct json will be returned as well as correct Content-Type<\/p>\n","protected":false},"excerpt":{"rendered":"
It can be a pain to return json-responses from a Function App, when you also want the proper Content-Type HTTP header to be returned, which it of course should. If you do it the straight-forward way (works the same with OkObjectResult) – return new BadRequestObjectResult(jsonResponse); if response contains a json string, it will be returned … Continue reading “Returning Json response from Azure Function v3+”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,1],"tags":[],"class_list":["post-1018","post","type-post","status-publish","format-standard","hentry","category-guides","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/wp.bizoir.dk\/index.php?rest_route=\/wp\/v2\/posts\/1018","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.bizoir.dk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.bizoir.dk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.bizoir.dk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.bizoir.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1018"}],"version-history":[{"count":4,"href":"https:\/\/wp.bizoir.dk\/index.php?rest_route=\/wp\/v2\/posts\/1018\/revisions"}],"predecessor-version":[{"id":1121,"href":"https:\/\/wp.bizoir.dk\/index.php?rest_route=\/wp\/v2\/posts\/1018\/revisions\/1121"}],"wp:attachment":[{"href":"https:\/\/wp.bizoir.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.bizoir.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.bizoir.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}