web.py 中的动态打印

发布于 2024-11-24 10:26:07 字数 562 浏览 1 评论 0原文

我正在将应用程序从 cgi 转移到 web.py。我得到结果并使用 cgi 中的简单打印语句动态打印它们。因此，在页面加载完成之前，结果就已经打印出来了。在 web.py 中，我有一个 return 语句，但不知道如何实现相同的效果。

示例 cgi 代码：

print "<p><b>Displaying Search Results</b></p>"
print "<table>"
cmd = subprocess.Popen(["find", location ,"-name", fileName], stdout=subprocess.PIPE)
for line in cmd.stdout:
    tableData=line.rstrip("\n")
    tableRow="<tr><td>tableData</td></tr>"
    print tableRow
print "</table>"

上面的代码在生成时会一次打印一行。我如何为 web.py 编写相同的内容？？？

原文

I'm shifting an application from cgi to web.py. I get results and print them dynamically with a simple print statement in cgi. So the results have been printed before the page has completed loading. In web.py, I have a return statement and can't figure out how I can achieve the same.

Sample cgi code:

print "<p><b>Displaying Search Results</b></p>"
print "<table>"
cmd = subprocess.Popen(["find", location ,"-name", fileName], stdout=subprocess.PIPE)
for line in cmd.stdout:
    tableData=line.rstrip("\n")
    tableRow="<tr><td>tableData</td></tr>"
    print tableRow
print "</table>"

The above code would print a row at a time as it is generated. How do I write the same for web.py???

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冷心人i 2024-12-01 10:26:07

要么使用附加到最后返回的字符串：

s = "My page with..."
s += "More data"
for y in x:
    s += "And this!"
return s

要么生成数据的能力，如 http://webpy 中所述。 org/cookbook/streaming_large_files
有一些问题，您必须设置一些标头，并且不能混合 return 和 yield 因为您将其设为生成器。

除了设置标题之外，您还可以使用：yield "Some more data"，类似于 CGI 脚本中的打印。

Either use a string which you append to and finally return:

s = "My page with..."
s += "More data"
for y in x:
    s += "And this!"
return s

Or the ability to yield data, described in http://webpy.org/cookbook/streaming_large_files
There are some gotchas, you have to set some headers and you can't mix return and yield since you make it a generator.

A part from setting the headers, you'd use: yield "Some more data", similar to print in your CGI-script.

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