Google App Engine将HTTP请求转到慢页面 [英] Google App Engine Go HTTP request to a slow page

问题描述

我想在转到响应缓慢的网站时使用Google App Engine发出HTTP请求。我的代码是：

I want to make a HTTP request using Google App Engine in Go to a slow-responding website. My code is:

func request(w http.ResponseWriter, r *http.Request) {
    c:=appengine.NewContext(r)
    client := urlfetch.Client(c)
    resp, err := client.Get("http://www.example.com")
    if err != nil {
        log.Print("err %s", err.String())
        return
    }
    ...}

打电话给我的网站后，我得到这样一个错误：

After calling my website, I get such an error:

API error 1 (urlfetch: INVALID_URL): ApplicationError: 5 timed out

一个bi，我发现一些运输类的参考允许等待长达60秒的HTTP请求 ，但我找不到任何描述或例子如何做这项工作。

After looking a bi into it, I found some reference to Transport class that allows to wait for HTTP requests for up to 60 seconds, but I can't find any description or example on how to make that work.

我如何做一个HTTP请求我n GAE Go的截止时间会超过5秒吗？

How can I make a HTTP request in GAE Go that will have a deadline longer than 5 seconds?

推荐答案

我会推荐如果可能的话，使用任务队列API 的主要请求处理程序。

I would recommend if possible, doing the urlfetch outside of your main request handler using Tasks Queue API.

在构建urlfetch.Transport时，您应该可以覆盖默认的截止日期，如下所示：

When constructing urlfetch.Transport, you should be able to override the default deadline like this:

t := urlfetch.Transport{Context:c, DeadlineSeconds: 5.0}
client := http.Client{Transport: &t}

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