在Tomcat7上安装和运行CGI代理Python

我想为openlayers设置一个在tomcat上运行的代理，因此我遵循以下步骤：

从OpenLayers网站下载了proxy.cgi文件：

代码如下：

#!c:/Python27/python.exe


"""This is a blind proxy that we use to get around browser
restrictions that prevent the Javascript from loading pages not on the
same server as the Javascript.  This has several problems: it's less
efficient, it might break some sites, and it's a security risk because
people can use this proxy to browse the web and possibly do bad stuff
with it.  It only loads pages via http and https, but it can load any
content type. It supports GET and POST requests."""

import urllib2
import cgi
import sys, os

# Designed to prevent Open Proxy type stuff.

allowedHosts = ['www.openlayers.org', 'openlayers.org', 
                'labs.metacarta.com', 'world.freemap.in', 
                'prototype.openmnnd.org', 'geo.openplans.org',
                'sigma.openplans.org', 'demo.opengeo.org',
                'www.openstreetmap.org', 'sample.azavea.com',
                'v2.suite.opengeo.org', 'v-swe.uni-muenster.de:8080', 
                'vmap0.tiles.osgeo.org', 'www.openrouteservice.org','localhost:6901']

method = os.environ["REQUEST_METHOD"]

if method == "POST":
    qs = os.environ["QUERY_STRING"]
    d = cgi.parse_qs(qs)
    if d.has_key("url"):
        url = d["url"][0]
    else:
        url = "http://www.openlayers.org"
else:
    fs = cgi.FieldStorage()
    url = fs.getvalue('url', "http://www.openlayers.org")

try:
    host = url.split("/")[2]
    if allowedHosts and not host in allowedHosts:
        print "Status: 502 Bad Gateway"
        print "Content-Type: text/plain"
        print
        print "This proxy does not allow you to access that location (%s)." % (host,)
        print
        print os.environ

    elif url.startswith("http://") or url.startswith("https://"):

        if method == "POST":
            length = int(os.environ["CONTENT_LENGTH"])
            headers = {"Content-Type": os.environ["CONTENT_TYPE"]}
            body = sys.stdin.read(length)
            r = urllib2.Request(url, body, headers)
            y = urllib2.urlopen(r)
        else:
            y = urllib2.urlopen(url)

        # print content type header
        i = y.info()
        if i.has_key("Content-Type"):
            print "Content-Type: %s" % (i["Content-Type"])
        else:
            print "Content-Type: text/plain"
        print

        print y.read()

        y.close()
    else:
        print "Content-Type: text/plain"
        print
        print "Illegal request."

except Exception, E:
    print "Status: 500 Unexpected Error"
    print "Content-Type: text/plain"
    print 
    print "Some unexpected error occurred. Error text was:", E

我的tomcat端口为6901，因此我修改了proxy.cgi文件，将我的域包括在allowedHosts列表中：

allowedHosts=['localhost:6901']

我已将proxy.cgi文件复制到以下文件夹：

$TOMCAT_PATH$/webapps/myApp/WEB-INF/cgi/

通过在下面的文件中添加节，修改了web应用程序的web.xml文件

$TOMCAT_PATH$/webapps/myApp/WEB-INF/WEB.xml

cgi
org.apache.catalina.servlets.CGIServlet
调试
0
cgiPathPrefix
WEB-INF/cgi
可执行
c:\python25\python.exe
密码环境
真的
5.
cgi
/cgi bin/*

注释：“executable”参数的“param value”必须包含Pyhton安装的路径。（确实如此！）

通过添加以下元素修改了我的web应用程序的context.xml文件，文件位于

$TOMCAT_PATH$/webapps/myApp/META-INF/context.xml

重新启动的雄猫

要将代理与OpenLayers一起使用，请在代码中包含这一行：

OpenLayers.ProxyHost=“/yourWebApp/cgi-bin/proxy.cgi？url=“

但是代理不起作用！当我尝试像这样使用它时：

/myApp/cgi-bin/proxy.cgi?url=labs.metacarta.com 

我得到这个错误：

Some unexpected error occurred. Error text was: list index out of range

---

我认为它与os.environ[“REQUEST_METHOD”]有关，但我不知道它是如何关联的。

问题似乎出现在您的

allowedHosts

行中。它应该包括您希望通过代理连接到的主机（例如，

allowedHosts=['labs.metacarta.com']

）