我想在python中使用线程来下载很多网页,并通过以下代码在网站之一中使用队列.
它放了一个无限的循环.每个线程是否连续运行,结束直到所有线程完成?我错过了什么.
#!/usr/bin/env python
import Queue
import threading
import urllib2
import time
hosts = ["http://yahoo.com", "http://google.com", "http://amazon.com",
"http://ibm.com", "http://apple.com"]
queue = Queue.Queue()
class ThreadUrl(threading.Thread):
"""Threaded Url Grab"""
def __init__(self, queue):
threading.Thread.__init__(self)
self.queue = queue
def run(self):
while True:
#grabs host from queue
host = self.queue.get()
#grabs urls of hosts and prints first 1024 bytes of page
url = urllib2.urlopen(host)
print url.read(1024)
#signals to queue job is done
self.queue.task_done()
start = time.time()
def main():
#spawn a pool of threads, and pass …Run Code Online (Sandbox Code Playgroud) 我正在使用mean.io的锅炉板代码并使用命令启动服务器
node server.js
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如何记录我的快递申请的stdout和stderr?
以下是我的server.js
'use strict';
/**
* Module dependencies.
*/
var mongoose = require('mongoose'),
passport = require('passport'),
logger = require('mean-logger');
/**
* Main application entry file.
* Please note that the order of loading is important.
*/
// Initializing system variables
var config = require('./server/config/config');
var db = mongoose.connect(config.db);
// Bootstrap Models, Dependencies, Routes and the app as an express app
var app = require('./server/config/system/bootstrap')(passport, db);
// Start the app by listening on <port>, optional hostname
app.listen(config.port, config.hostname); …Run Code Online (Sandbox Code Playgroud) 我处理的一些网站有很多ajax请求.我打算在点击断言元素之前等待Ajax请求完成.目前我用
try {
if (driver instanceof JavascriptExecutor) {
JavascriptExecutor jsDriver = (JavascriptExecutor)driver;
for (int i = 0; i< timeoutInSeconds; i++)
{
Object numberOfAjaxConnections = jsDriver.executeScript("return jQuery.active");
// return should be a number
if (numberOfAjaxConnections instanceof Long) {
Long n = (Long)numberOfAjaxConnections;
System.out.println("Number of active jquery ajax calls: " + n);
if (n.longValue() == 0L) break;
}
Thread.sleep(1000);
}
}
else {
System.out.println("Web driver: " + driver + " cannot execute javascript");
}
}
catch (InterruptedException e) {
System.out.println(e);
}
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但它适用于Ajax请求,但不适用于任何具有jQuery库变体的类似请求. …
我试图找到是否在预保存中更改了对象并相应地执行了一些操作.Followinfg是我的代码
var eql = require("deep-eql");
OrderSchema.post( 'init', function() {
this._original = this.toObject();
});
OrderSchema.pre('save', function(next) {
var original = this._original;
delete this._original;
if(eql(this, original)){
//do some actions
}
next();
});
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即使我没有改变任何东西,它也会返回false!
我在java 8中使用play2.5.我正在向服务器发出POST请求
WSRequest request = ws.url("http://abababa .com");
WSRequest complexRequest = request.setHeader("X-API-Key", "xxxxxx")
.setHeader("Content-Type", "application/x-www-form-urlencoded")
CompletionStage<WSResponse> responsePromise = complexRequest.post("grant_type=password"
+ "&username=xxxxx&password=yyyyy");
CompletionStage<JsonNode> jsonPromise = responsePromise.thenApply(WSResponse::asJson);
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如何打印响应的最终响应.我想返回部分响应此函数.与同步代码相比,调用此函数的函数是否也具有不同的代码?
方法和静态之间有什么区别?
Mongoose API将静态定义为
Statics are pretty much the same as methods but allow for defining functions that exist directly on your Model.
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究竟是什么意思?直接在模型上存在什么意味着什么?
文档中的静态代码
AnimalSchema.statics.search = function search (name, cb) {
return this.where('name', new RegExp(name, 'i')).exec(cb);
}
Animal.search('Rover', function (err) {
if (err) ...
})
Run Code Online (Sandbox Code Playgroud) 我试图通过cpan安装Net :: SSLeay来安装Email :: Send :: SMTP :: TLS但是我收到以下错误.
cpan[5]> install Net::SSLeay
Running install for module 'Net::SSLeay'
Running make for M/MI/MIKEM/Net-SSLeay-1.49.tar.gz
Has already been unwrapped into directory /home/ubuntu/.cpan/build/Net-SSLeay-1.49-VDZ57t
Could not make: Unknown error
Running make test
Can't test without successful make
Running make install
Make had returned bad status, install seems impossible
Run Code Online (Sandbox Code Playgroud) 目前我正在为搜索编写webdriver测试,它使用ajax作为建议.如果我在输入搜索内容之后和按Enter之前添加显式等待,则测试效果很好.
wd.find_element_by_xpath("//div[@class='searchbox']/input").send_keys("obama")
time.sleep(2)
wd.find_element_by_xpath("//div[@class='searchbox']/input").send_keys(Keys.RETURN)
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但
wd.find_element_by_xpath("//div[@class='searchbox']/input").send_keys("obama")
wd.find_element_by_xpath("//div[@class='searchbox']/input").send_keys(Keys.RETURN)
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失败.我正在使用1个虚拟CPU运行ec2测试.我怀疑,甚至在发送与搜索相关的GET请求之前我按下了输入,如果我在建议之前按Enter键,它就会失败.
有没有更好的方法来添加显式等待?
我目前正在使用node,express和angularjs处理MEAN堆栈.我在浏览代码时从mean.io下载了样板代码并使用了调试器.
在获取req和res作为参数的控制器中,req.assert如何工作?
在文件server/controllers/users.js中
req.assert('username', 'Username cannot be more than 20 characters').len(1,20);
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即使用户名为空或为null,也会添加到验证错误中.如何检查req中的当前用户名值?定义了req的断言函数在哪里.
我来自java背景,发现很难找到功能代码,因为我不确定它在哪里定义,它是如何原型化的.如何正确读取对象并浏览javascript中使用的函数?
我希望我的服务器允许我的移动应用程序的"授权"标题.目前我的网络服务器是帆,我使用帆.我的路线代码是
'post /auth/local' : {
cors: {
origin: '*'
},
controller: 'AuthController',
action: 'callback'
},
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当我的客户端在标头中发送带有"授权"的请求时,我收到错误
XMLHttpRequest cannot load http://localhost:1337/auth/local.
Request header field Authorization is not allowed by Access-Control-Allow-Headers.
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如何在我的路线代码中指定还允许"授权"标题?