如何解决kotlinx.serialization.SerializationException:找不到类“MultiPartFormDataContent”的序列化程序
我正在尝试上传多个文件。
val ktorVersion = "1.5.0"
val serializationVersion = "1.0.1"
我就是这样做的:
override suspend fun uploadFiles(
binaryFiles: Map<String,ByteArray>
): BaseResponse<List<String>> {
return client.submitForm {
url(fileUploadUrl)
method = HttpMethod.Post
body = MultiPartFormDataContent(
formData {
headers{
append("Content-Type","application/json")
append("Authorization","Bearer $token}")
}
binaryFiles.entries.forEach {
append(
key = "files",value = it.value,headers = Headers.build {
append(HttpHeaders.ContentDisposition,"filename=${it.key}")
}
)
}
}
)
}
}
但它抛出异常
kotlinx.serialization.SerializationException: Serializer for class 'MultiPartFormDataContent' is not found.
Mark the class as @Serializable or provide the serializer explicitly.
at kotlinx.serialization.internal.Platform_commonKt.serializerNotRegistered(Platform.common.kt:91)
at kotlinx.serialization.SerializersKt__SerializersKt.serializer(Serializers.kt:130)
at kotlinx.serialization.SerializersKt.serializer(Unknown Source)
at io.ktor.client.features.json.serializer.KotlinxSerializerKt.buildSerializer(KotlinxSerializer.kt:82)
at io.ktor.client.features.json.serializer.KotlinxSerializerKt.access$buildSerializer(KotlinxSerializer.kt:1)
at io.ktor.client.features.json.serializer.KotlinxSerializer.writeContent$ktor_client_serialization(KotlinxSe
at io.ktor.client.features.json.serializer.KotlinxSerializer.write(KotlinxSerializer.kt:26)
at io.ktor.client.features.json.JsonFeature$Feature$install$1.invokeSuspend(JsonFeature.kt:150)
at io.ktor.client.features.json.JsonFeature$Feature$install$1.invoke(JsonFeature.kt)
at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243)
at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113)
at io.ktor.util.pipeline.SuspendFunctionGun.proceedWith(SuspendFunctionGun.kt:123)
at io.ktor.client.features.HttpCallValidator$Companion$install$1.invokeSuspend(HttpCallValidator.kt:106)
at io.ktor.client.features.HttpCallValidator$Companion$install$1.invoke(HttpCallValidator.kt)
at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243)
at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113)
at io.ktor.client.features.HttpRequestLifecycle$Feature$install$1.invokeSuspend(HttpRequestLifecycle.kt:37)
at io.ktor.client.features.HttpRequestLifecycle$Feature$install$1.invoke(HttpRequestLifecycle.kt)
at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243)
at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113)
at io.ktor.util.pipeline.SuspendFunctionGun.execute(SuspendFunctionGun.kt:133)
at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:79)
at io.ktor.client.HttpClient.execute(HttpClient.kt:187)
at io.ktor.client.statement.HttpStatement.executeUnsafe(HttpStatement.kt:104)
at com.example.package.core.data.network.services.upload.FileUploadApiImpl.uploadFiles(FileUploadApi.kt:99)
我也试过这种方法,但遇到了同样的问题:
suspend fun uploadFilesTest(
binaryFiles: Map<String,ByteArray>
): BaseResponse<List<String>> {
return client.post(fileUploadUrl) {
headers {
append("Content-Type",ContentType.Application.Json)
append("Authorization","Bearer $token")
}
body = MultiPartFormDataContent(
formData {
binaryFiles.entries.forEach {
this.appendInput(
key = "files",size = it.value.size.toLong(),"filename=${it.key}")
},){ buildPacket { writeFully(it.value) }}
}
}
)
}
}
解决方法
看看你说你有同样问题的最后一个片段,你似乎在这样的标题中指定内容类型
append("Content-Type",ContentType.Application.Json)
但您还希望通过将 body 设置为 MultiPartFormDataContent
使其成为多部分,这也需要定义为标题 content-type:multipart/form-data; ...
因此可能是此冲突导致了问题。
我实际上只是在我的代码中自己尝试过,这似乎是我的问题。
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