我必须在我的 akka 代码中发送以下curl POST 请求,它在请求中发送 json 负载和文件:
curl \
-F "payload=</tmp/upload_file_payload.json" \
-F "file=@/tmp/file.pdf" \
-v https://host/api
我正在尝试在 akka-http 中实现相同的功能,但不确定具体该怎么做。我找到了一些例子here和 here ,但它不能按原样工作,所以我编写了以下代码,其中也有一些错误,但看起来我很接近:
val httpEntity = HttpEntity(MediaTypes.`application/octet-stream`, file, 100000)
// val httpEntity = HttpEntity.fromPath(ContentType.apply(MediaTypes.`application/octet-stream`), Paths.get(file.getAbsolutePath))
val fileFormData = Multipart.FormData.BodyPart.Strict("file", httpEntity, Map.empty)
val jsonFormData = Multipart.FormData.BodyPart.Strict("payload", payload, Map.empty)
// Multipart.FormData.Strict(scala.collection.immutable.Seq(jsonFormData, fileFormData)).toEntity()
val entity = Multipart.FormData( Source(List(jsonFormData, fileFormData))).toEntity()
val httpRequest = HttpRequest(HttpMethods.POST, uri = uri, entity = entity)
但是这段代码无法编译。
在这期间,当我编译代码时,出现错误:
411 Length Requered
我尝试添加 Content-Length
header 与请求,但无济于事。
最佳答案
最后,在查看了 akka-http 代码和更多尝试之后,终于我得到了如下的工作,注释中的解释:
val httpEntity = HttpEntity(MediaTypes.`application/octet-stream`, file, 100000).toStrict(10.seconds)(mat) // I had to convert this into strict: which adds Content-Length and tells it is not streaming
val fileFormData = Multipart.FormData.BodyPart.Strict("file", Await.result(httpEntity, 10.seconds), Map.empty) // used Await here to get httpEntity from Future, this might be made better
val jsonFormData = Multipart.FormData.BodyPart.Strict("payload", payload, Map.empty)
val entity = Multipart.FormData(jsonFormData, fileFormData).toEntity() // Corrected this signature
val httpRequest = HttpRequest(HttpMethods.POST, uri = uri, entity = entity)
为了避免 411
错误,我必须使 FormData
严格,它本身会添加所需的 Content-Length
header 。
关于scala - 如何使用 akka-http 在 Post 请求中一起发送文件和 json 负载,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47397585/