问题描述
使用Google AppEngine读取文件的正确方法是什么（）？
在Java中，我读过 context.getResourceAsStream ，是否有任何等价的函数？
您可以从App Engine上的文件读取，就像您可以从计算机上运行的Go应用程序中的文件中读取一样。 b
$ b
请注意以下几点： 您应该使用 relative 文件路径而不是绝对路径。工作目录是您的应用程序的根文件夹（其中
app.yaml 文件所在的位置）。 application_readable 选项） href =https://cloud.google.com/appengine/docs/go/config/appconfig =nofollow noreferrer>应用程序配置页面，部分。引用相关部分：
假设您的应用程序根目录中有一个文件夹 data （位于 app.yaml ）和一个文件 list.txt 。您可以阅读其内容，如下所示：
if content，err：= ioutil.Readfile（data / list.txt） ; err！= nil {
//无法读取文件，处理错误
} else {
//成功，对内容做
}
或者如果您想/需要（实现 io.Reader 以及许多其他）：
f，err：= os.Open（data / list.txt）//用于读取访问。
if err！= nil {
//无法打开文件，日志/句柄错误
返回
}
推迟f.Close（）
/ /您可以在这里阅读f
相关问题：
静态页面在Google App Engine中返回404 What's the correct way to read a file using Google AppEngine (Go)? In Java I read there are You can read from files on App Engine the same way you can read from files in a Go app running on your computer. Some things to keep in mind: You should use relative file paths instead of absolute. The working directory is the root folder of your app (where the Only files that are application files can be read by Go code, so if you want to read a file from Go code, the file must not be matched by a static file pattern (or if it must be available as a static file too, The latter is detailed on the Application configuration page, Section Static file handlers. Quoting the relevant part: So let's say you have a folder Or if you want / need an io.Reader ( Related questions: Google App Engine Golang no such file or directory Static pages return 404 in Google App Engine How do I store the private key of my server in google app engine? 这篇关于在Go AppEngine中正确读取文件的方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！
context.getResourceAsStream, is there any equivalent function for that?app.yaml file resides).application_readable option must be specified at the static file handler which includes/applies to the file, details).data in your app's root (next to app.yaml), and a file list.txt in it. You may read its content like this:if content, err := ioutil.Readfile("data/list.txt"); err != nil {
// Failed to read file, handle error
} else {
// Success, do something with content
}
os.File implements io.Reader along with many other):f, err := os.Open("data/list.txt") // For read access.
if err != nil {
// Failed to open file, log / handle error
return
}
defer f.Close()
// Here you may read from f