在Google App Engine中打印文件 [英] printing files in Google App Engine
问题描述
我试图在Google App Engine中读取并打印文件，但下面的代码似乎没有响应。我可以上传文件，我的期望是它只会打印文本，但它什么也不做。我想添加一个提交按钮，但我不知道如何链接提交与pythons打印。我怎么才能得到这个命令打印？
I am trying to read and print a file in Google App Engine, but the code bellow seems unresponsive. I can upload the file, and my expectation was that it would just print the text, but it does nothing. I thought about adding a submit button, but I have no idea how to link submit with pythons printing. How can I get this to print on command?
我已经看到GAE 这里，但我首先想把它全部放在一页上，其次我仍然不明白提交如何调用第二页。 / p>
I have seen the example provided by GAE here, but I would first like to keep it all on one page, and second I still don't understand how the submit calls that second page.
import webapp2
from google.appengine.ext.webapp import util
class MainPage(webapp2.RequestHandler):
#http://bukhantsov.org/2011/12/python-google-app-engine-calculator/
def get(self):
# build a list of operations
self.response.out.write("""<html>
<body>
<form action='/' method='get' autocomplete='off'>
<input type='file' name='file'/><br/>
#<input type='submit' name="test" value="submit">
</form>
</body>
</html>""")
file = self.request.get('file')
self.response.out.write(file)
app = webapp2.WSGIApplication([('/', MainPage)], debug=True)
def main():
util.run_wsgi_app(app)
if __name__ == '__main__':
main()
推荐答案
您的表单使用HTTP GET方法发送，但对于文件上传，您需要POST。将其改为：
Your form is sent using the HTTP GET method, but for file uploads you need POST. Change it from:
method='get'
到：
method='post'
您还需要使用其他方法处理POST请求。 POST主体本身应该可以用作 self.request.POST 。所以你最终会得到类似的结果：
You will also need to handle POST requests in a different method. The POST body itself should be available as self.request.POST. So you end up with something like:
def post(self):
file = self.request.POST['file']
self.response.out.write(file)
这篇关于在Google App Engine中打印文件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IT屋！
