Question

我无法让AppEngine Blobstore上传示例正常运行。进一步看，我看到Blobstore.Send（）总是返回HTTP 206“部分响应”。

package blobstore_example

import (
        "html/template"
        "io"
        "net/http"

        "appengine"
        "appengine/blobstore"
)

func serveError(c appengine.Context, w http.ResponseWriter, err error) {
        w.WriteHeader(http.StatusInternalServerError)
        w.Header().Set("Content-Type", "text/plain")
        io.WriteString(w, "Internal Server Error")
        c.Errorf("%v", err)
}

var rootTemplate = template.Must(template.New("root").Parse(rootTemplateHTML))

const rootTemplateHTML = `
<html><body>
<form action="{{.}}" method="POST" enctype="multipart/form-data">
Upload File: <input type="file" name="file"><br>
<input type="submit" name="submit" value="Submit">
</form></body></html>
`

func handleRoot(w http.ResponseWriter, r *http.Request) {
        c := appengine.NewContext(r)
        uploadURL, err := blobstore.UploadURL(c, "/upload", nil)
        if err != nil {
                serveError(c, w, err)
                return
        }
        w.Header().Set("Content-Type", "text/html")
        err = rootTemplate.Execute(w, uploadURL)
        if err != nil {
                c.Errorf("%v", err)
        }
}

func handleServe(w http.ResponseWriter, r *http.Request) {
        blobstore.Send(w, appengine.BlobKey(r.FormValue("blobKey")))
}

func handleUpload(w http.ResponseWriter, r *http.Request) {
        c := appengine.NewContext(r)
        blobs, _, err := blobstore.ParseUpload(r)
        if err != nil {
                serveError(c, w, err)
                return
        }
        file := blobs["file"]
        if len(file) == 0 {
                c.Errorf("no file uploaded")
                http.Redirect(w, r, "/", http.StatusFound)
                return
        }
        http.Redirect(w, r, "/serve/?blobKey="+string(file[0].BlobKey), http.StatusFound)
}

func init() {
        http.HandleFunc("/", handleRoot)
        http.HandleFunc("/serve/", handleServe)
        http.HandleFunc("/upload", handleUpload)
}

Firefox 32不播放此内容并说：

Video can't be played because the file is corrupt.

然而，如果我使用wget保存文件，我会得到包含所有字节的精确mp4文件 - 本地播放器可以播放mp4。

捕获HTTP数据包我发现Firefox并没有要求HTTP请求中的字节范围 - 但Blobstore响应包括：

Content-Range: bytes 0-245778/245779\r\n

（顺便说一句是mp4文件的完整大小）。

那么为什么Blobstore认为它必须返回HTTP 206？ ......以及如何不去？

AppEngine Blobstore不断返回206部分响应

0 个答案: