Python不在浏览器中执行答案

【问题标题】：Python not executing in browserPython不在浏览器中执行
【发布时间】：2017-02-25 16:47:17
【问题描述】：

我有一个从不同 python 文件导入函数的 cgi 脚本。我正在使用这些文件来设置 Hadoop 集群。所以它主要有 commands.getstatus 输出代码。 cgi 文件只是在传递参数时调用这些函数。

但它不执行功能。当我通过终端运行它时，这工作正常。我将不胜感激。

cgi 文件：

#!/usr/bin/python

import cgi
import cgitb
import os
import commands
import base2
cgitb.enable()

print "content-type:text/html"
print ""

dn_iplist=[]

base2.ipscanner();
base2.freemem();
base2.procno();
base2.freehd();

dn_iplist = sorted(base2.spacedict, key=lambda x: float(base2.spacedict[x][:-1]), reverse=True)[:2]

masterdict = base2.memdict.copy()

for key in dn_iplist:
    if key in masterdict:   
        del masterdict[key]

#print masterdict

#####################Resource Manager IP
rmip = max(masterdict, key=lambda key: int(masterdict[key]))
del masterdict [rmip]
#####################Namenode IP
nnip = max(masterdict, key=lambda key: int(masterdict[key]))
del masterdict[nnip]
#####################Client IP
cip = max(masterdict, key=lambda key: int(masterdict[key]))

print """
<html>
<head>
    <title>Hadoop Cluster Services - Create and Manage your Hadoop clusters</title>
    <link rel="stylesheet" type="text/css" href="/css/style1.css">
</head>

<body>
        <br><b>
        <div class="drop">
        <ul class="drop_menu">
            <li><a href="home.html">HOME</a></li>
            <li><a href="create.cgi">CLUSTER</a>
                <ul>
                    <li><a href="/loader.html">Create Cluster</a></li>
                    <li><a href="#">Manage Cluster</a></li> 
                </ul>
            </li>
            <li><a href="#">SERVICES</a>
                <ul>
                    <li><a href="#">Shell</a></li>
                    <li><a href="#">Create Cluster</a></li> 
                    <li><a href="#">System Admin</a></li>   
                </ul>
            </li>
        </ul>   
        </div>

    <br><br><br><br><br>
    <div id="autoips">
        Resource Manager IP: """ 
print rmip
print "<br><br>Namenode IP: "
nport = "9001"
print nnip + ":" + nport 
print "<br><br>Client IP: "
print cip
print "<br><br>Datanodes/NodeManagers: "
for k in dn_iplist:
    print k + ","
print """<br><br><input type="submit" value="Accept"> """

print "<br><br><br> BUILDING CLUSTER"

print"""        

    </div>

</body>

</html>
"""

base2.make_rm(rmip,nnip,nport)
print "<br>"
base2.make_nn(nnip,nport)
print "<br>"
base2.make_client(nnip,nport,rmip,cip)
print "<br>"
for dnip in dn_iplist:
    print dnip  
    base2.make_dnnm(nnip,nport,rmip,dnip)
    print "<br>"

py文件的一部分：

#resourcemanager creation

def make_rm(rmip,nip,nport):
    fp = open("temp1.txt",mode="w")
    fp.write('<?xml version="1.0"?>\n<!-- Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.See the License for the specific language governing permissions and limitations under the License. See accompanying LICENSE file.-->\n\n<configuration>\n\n<!-- Site specific YARN configuration properties -->\n\n<property>\n<name>yarn.resourcemanager.resource-tracker.address</name>\n<value>'+rmip+':8025</value>\n</property>\n\n<property>\n<name>yarn.resourcemanager.scheduler.address</name>\n<value>'+rmip+':8030</value>\n</property>\n\n</configuration>')
    fp.close()
    commands.getstatusoutput("sshpass -p redhat scp temp1.txt "+rmip+":/hadoop2/etc/hadoop/yarn-site.xml")

    fp = open("temp2.txt",mode="w")
    fp.write('<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="configuration.xsl"?>\n<!--  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.See the License for the specific language governing permissions and limitations under the License. See accompanying LICENSE file.-->\n\n<!-- Put site-specific property overrides in this file. -->\n\n <configuration>\n\n<property>\n <name>fs.default.name</name>\n<value>'+nip+':' +nport+ '</value>\n</property>\n</configuration>\n')
    fp.close()
    commands.getstatusoutput("sshpass -p redhat scp temp2.txt "+rmip+":/hadoop2/etc/hadoop/core-site.xml")
    # print("Resourcemanager setup.\n")

    commands.getstatusoutput("sshpass -p redhat ssh -o StrictHostKeyChecking=no root@"+rmip+" yarn-daemon.sh start resourcemanager")

    a = commands.getstatusoutput("sshpass -p redhat ssh -o StrictHostKeyChecking=no root@"+rmip+" /usr/java/jdk1.7.0_79/bin/jps | grep 'ResourceManager' | awk '{print $2}'")

    if a[1] == "ResourceManager":
        print("ResourceManager setup complete!")

这是我得到的结果。它显示安装完成。但是什么都没做。但它通过终端完美执行。

应该有类似的Datanode设置完成！在底部的 192.168.100.107 IP 旁边。此代码不会将临时文件复制到其他 VM。

编辑：可能与 commands.getstatusoutput 命令有关吗？为什么只影响scp

【问题讨论】：

请注意，您不应该这样做import os,commands。我强烈建议您在编写任何 python 代码之前阅读PEP 8！
你是说我不应该把它们放在一起吗？他们不是。我只有导入命令。
我说你应该把import os 和import commands 放在两个单独的行上。您改为使用逗号将它们导入一行。
嗯，好的。我没有在另一个文件中注意到它。谢谢。
@StamKaly 但这仍然没有改变任何东西。它仍然无法正常工作。

标签： python apache shell cgi httpd.conf

【解决方案1】：

终于修好了。我必须在 scp 命令中添加一个 root@ipaddress

来自

commands.getstatusoutput("sshpass -p redhat scp temp1.txt "+rmip+":/hadoop2/etc/hadoop/core-site.xml")

到

commands.getstatusoutput("sshpass -p redhat scp temp1.txt root@"+rmip+":/hadoop2/etc/hadoop/core-site.xml")

必须对所有 ssh/scp 命令进行此更改。如果没有这个，httpd 会尝试使用没有 root 权限的“apache”用户进行 ssh。这就是代码在浏览器中失败的原因。

【讨论】：