connect

pgadmin: getting “DETAIL: User does not have CONNECT privilege.” error

由 柔情痞子 提交于 2020-05-29 01:15:32
问题 I’m using pgAdmin III on Mac Yosemite. I created a role, “discount”, and created a database “discount”. In the pgadmin tool, how do I give the user “discount” connect privileges (and table read/write privileges) to the database “discount”? Currently, when I try and login at a command line I get this error davea$ psql -h localhost -d discount -U discount Password for user discount: psql: FATAL: permission denied for database "discount" DETAIL: User does not have CONNECT privilege. 回答1:

pgadmin: getting “DETAIL: User does not have CONNECT privilege.” error

由 微笑、不失礼 提交于 2020-05-29 01:14:48
问题 I’m using pgAdmin III on Mac Yosemite. I created a role, “discount”, and created a database “discount”. In the pgadmin tool, how do I give the user “discount” connect privileges (and table read/write privileges) to the database “discount”? Currently, when I try and login at a command line I get this error davea$ psql -h localhost -d discount -U discount Password for user discount: psql: FATAL: permission denied for database "discount" DETAIL: User does not have CONNECT privilege. 回答1:

Visual Studio 2015 - Debug with HTTP connection problems

由 眉间皱痕 提交于 2020-05-16 07:43:56
问题 I have a program (console application) that makes use of LinqToTwitter to read some tweets. When I debug the program I get an error "The underlying connection was closed: An unexpected error occurred in a submission". Message = An error occurred while sending the request. Message = The underlying connection was closed: An unexpected send error occurred. If I build the program, I can run the program without any problems. I already researched and can't find the problem. Does it have to do with

Visual Studio 2015 - Debug with HTTP connection problems

由 心不动则不痛 提交于 2020-05-16 07:43:38
问题 I have a program (console application) that makes use of LinqToTwitter to read some tweets. When I debug the program I get an error "The underlying connection was closed: An unexpected error occurred in a submission". Message = An error occurred while sending the request. Message = The underlying connection was closed: An unexpected send error occurred. If I build the program, I can run the program without any problems. I already researched and can't find the problem. Does it have to do with

What is the correct way to “end” a request from express/connect middleware?

由 天涯浪子 提交于 2020-05-12 11:14:14
问题 Assuming I have middleware such as this; var express = require('express'); var app = express(); app.use(function (req, res, next) { var host = "example.com"; if (req.host !== host) { res.redirect(301, host + req.originalUrl); res.end(); } }); What sort of rules do I need to abide by here? Should I be calling res.end() ? (or does res.redirect() do this for me?) Should I be calling next() ? (or does connect detect the request has ended and exit cleanly?) Assuming that I should be calling next()

What is the correct way to “end” a request from express/connect middleware?

由 余生长醉 提交于 2020-05-12 11:14:14
问题 Assuming I have middleware such as this; var express = require('express'); var app = express(); app.use(function (req, res, next) { var host = "example.com"; if (req.host !== host) { res.redirect(301, host + req.originalUrl); res.end(); } }); What sort of rules do I need to abide by here? Should I be calling res.end() ? (or does res.redirect() do this for me?) Should I be calling next() ? (or does connect detect the request has ended and exit cleanly?) Assuming that I should be calling next()

[Algo] Min Cost to Cut Ropes

由 我们两清 提交于 2020-04-06 05:26:12
Given n ropes of different lengths, we need to connect these ropes into one rope. We can connect only 2 ropes at a time. The cost required to connect 2 ropes is equal to sum of their lengths. The length of this connected rope is also equal to the sum of their lengths. This process is repeated until n ropes are connected into a single rope. Find the min possible cost required to connect all ropes. Example 1: Input: ropes = [8, 4, 6, 12] Output: 58 Explanation: The optimal way to connect ropes is as follows 1. Connect the ropes of length 4 and 6 (cost is 10). Ropes after connecting: [8, 10, 12]

java实现http的post和get

由 我是研究僧i 提交于 2020-03-31 02:57:50
前话说一句：conn.setDefaultRequestProperty(key, value);这个函数是设置属性的，其实可以没有！ 自己写了一个简单的get，容易控制 public static String callURLtoGet(String strURL) { try { URL url = new URL(strURL); // BufferedReader receiver = new BufferedReader(new InputStreamReader(url.openStream())); BufferedReader receiver = new BufferedReader(new InputStreamReader(url.openConnection().getInputStream())); StringBuffer msg = new StringBuffer(); char[] data = new char[512]; int n = 0; while ((n = receiver.read(data, 0, 512)) != -1) { msg.append(data, 0, n); } return msg.toString().trim(); } catch (Exception e) { e.printStackTrace();

swoole 示例

由 我的未来我决定 提交于 2020-03-27 14:54:20
$str = $_GET['a'];$client = new swoole_client(SWOOLE_SOCK_TCP);if (!$client->connect("127.0.0.1", 9501, -1)){ exit("connect failed. Error: {$client->errCode}\n");}$client->send("hello world\n" . $str);echo $client->recv(); //打印 接收到的数据$client->close(); $server = new swoole_server("127.0.0.1", 9501);$server->on('connect', function ($server, $fd){ echo "connection open: {$fd}\n";});$server->on('receive', function ($server, $fd, $reactor_id, $data) { $server->send($fd, "Swoole: {$data}"); $server->close($fd);});$server->on('close', function ($server, $fd) { echo "connection close: {$fd}\n";});

socket通信基础内容

由 亡梦爱人 提交于 2020-03-26 16:55:37
对 TCP/IP、 UDP、 Socket编程这些词你不会很陌生吧？随着网络技术的发展，这些词充斥着我们的耳朵。那么我想问： 1. 什么是 TCP/IP、 UDP？ 2. Socket在哪里呢？ 3. Socket是什么呢？ 4. 你会使用它们吗？ 什么是 TCP/IP 、 UDP ？ TCP/IP（ Transmission Control Protocol/Internet Protocol）即传输控制协议 /网间协议，是一个工业标准的协议集，它是为广域网（ WANs）设计的。 UDP（ User Data Protocol，用户数据报协议）是与 TCP相对应的协议。它是属于 TCP/IP协议族中的一种。 这里有一张图，表明了这些协议的关系。 图 1 TCP/IP协议族包括运输层、网络层、链路层。现在你知道 TCP/IP与 UDP的关系了吧。 Socket 在哪里呢？ 在图 1中，我们没有看到 Socket的影子，那么它到底在哪里呢？还是用图来说话，一目了然。 图 2 原来 Socket在这里。 Socket 是什么呢？ Socket是应用层与 TCP/IP协议族通信的中间软件抽象层，它是一组接口。在设计模式中， Socket其实就是一个门面模式，它把复杂的 TCP/IP协议族隐藏在 Socket接口后面，对用户来说，一组简单的接口就是全部，让 Socket去组织数据
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