我正在尝试 get a image file from URL并使用文档将其保存到 GCS 存储 here .
鉴于我的 AppEngine 环境,我不知道如何创建从 response.Body
到 GSC 的文件...我无法使用 os.Create 创建并在此引用文件路径环境对吧?
- 寻找有关在 AppEngine 中部署时将
response.Body
传递给wc.Write()
方法的技巧。
获取文件的代码:
func main() {
url := "http://i.imgur.com/m1UIjW1.jpg"
// don't worry about errors
response, e := http.Get(url)
if e != nil {
log.Fatal(e)
}
defer response.Body.Close()
//open a file for writing
file, err := os.Create("/tmp/asdf.jpg")
if err != nil {
log.Fatal(err)
}
// Use io.Copy to just dump the response body to the file. This supports huge files
_, err = io.Copy(file, response.Body)
if err != nil {
log.Fatal(err)
}
file.Close()
fmt.Println("Success!")
}
将本地文件保存到 GCS
func (d *demo) createFile(fileName string) {
fmt.Fprintf(d.w, "Creating file /%v/%v\n", d.bucketName, fileName)
wc := d.bucket.Object(fileName).NewWriter(d.ctx)
wc.ContentType = "text/plain"
wc.Metadata = map[string]string{
"x-goog-meta-foo": "foo",
"x-goog-meta-bar": "bar",
}
d.cleanUp = append(d.cleanUp, fileName)
if _, err := wc.Write([]byte("abcde\n")); err != nil {
d.errorf("createFile: unable to write data to bucket %q, file %q: %v", d.bucketName, fileName, err)
return
}
if _, err := wc.Write([]byte(strings.Repeat("f", 1024*4) + "\n")); err != nil {
d.errorf("createFile: unable to write data to bucket %q, file %q: %v", d.bucketName, fileName, err)
return
}
if err := wc.Close(); err != nil {
d.errorf("createFile: unable to close bucket %q, file %q: %v", d.bucketName, fileName, err)
return
}
}
最佳答案
您似乎在寻找 Writer和一个 bytes.Buffer :
var buff bytes.Buffer
writer := NewWriter(buff)
n, err := io.Copy(writer, response.Body)
关于google-app-engine - Golang 将文件从 URL 保存到 AppEngine 中的 GCS Bucket,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41794004/