415（不支持的媒体类型）错误

Question

self.zipDocs = function (docs, callback) {
    var xhr = new XMLHttpRequest();

    xhr.onreadystatechange = function () {//Call a function when the state changes.
        if (xhr.readyState == 4 && xhr.status == 200) {
            alert(xhr.responseBody);
        }
    }
    xhr.open("POST", '../API/documents/zip', true);
    xhr.setRequestHeader("Content-type", "application/json");
    xhr.responseType = "arraybuffer";
    console.log(docs);
    xhr.send(docs);

    var arraybuffer = xhr.response;
    var blob = new Blob([arraybuffer], { type: "application/zip" });
    saveAs(blob, "example.zip");
}

[HttpPost]
    [Route("documents/zip")]
    public HttpResponseMessage ZipDocs([FromBody] string[] docs)
    {

    using (var zipFile = new ZipFile())
    {
        zipFile.AddFiles(docs, false, "");
        return ZipContentResult(zipFile);
    }
}

protected HttpResponseMessage ZipContentResult(ZipFile zipFile)
{
    // inspired from http://stackoverflow.com/a/16171977/92756
    var pushStreamContent = new PushStreamContent((stream, content, context) =>
    {
       zipFile.Save(stream);
        stream.Close(); // After save we close the stream to signal that we are done writing.
    }, "application/zip");

    return new HttpResponseMessage(HttpStatusCode.OK) { Content = pushStreamContent };
}

POST http://localhost:1234/MyProject/API/documents/zip 415 (Unsupported Media Type)

Answer 1

根据本员额

你也许想试试

xhr.setRequestHeader("Accept", "application/json");

您的代码中缺少一个分号

xhr.setRequestHeader("Content-type", "application/json")