64、ubuntu20.04安装Postman测试http通信和测试其libcurl支持http客户端发送request

基本思想：需要使用http协议完成业务需求，需要测试一下，所以学习一下想关的应用实践

一、下载Postman　Postman

1.  
   ubuntu@ubuntu:~$ tar-zxvf postman-linux-x64.tar.gz
2.  
   ubuntu@ubuntu:~/postman-linux-x64/Postman$ ./Postman

帐号某宝解决，也可以试用30天

二、固定postman到任务栏图标

ubuntu@ubuntu:~$ sudo gedit /usr/share/applications/Postman.desktop

添加内容

1.  
   [Desktop Entry]
2.  
   Type=Application
3.  
   Name=Postman
4.  
   GenericName=Postman
5.  
   Comment=Postman:The Postman IDE
6.  
   Exec="/home/ubuntu/postman-linux-x64/Postman/Postman" %f
7.  
   Icon=/home/ubuntu/postman-linux-x64/Postman/app/icons/icon_128x128.png
8.  
   Terminal=Postman
9.  
   Categories=Postman

 再次设置一下图标。使用下列命令打开Postman然后用十字光标点击一下postman工具，显示下列字段

1.  
   ubuntu@ubuntu:~$ xprop |grep WM_CLASS
2.  
   WM_CLASS(STRING) = "postman", "Postman"
3.  
   ubuntu@ubuntu:~$

重新修正配置文件

1.  
   [Desktop Entry]
2.  
   Type=Application
3.  
   Name=Postman
4.  
   GenericName=Postman
5.  
   Comment=Postman:The Postman IDE
6.  
   Exec="/home/ubuntu/postman-linux-x64/Postman/Postman" %f
7.  
   Icon=/home/ubuntu/postman-linux-x64/Postman/app/icons/icon_128x128.png
8.  
   Terminal=Postman
9.  
   Categories=Postman
10.  
    StartupWMClass=postman

再次重启Postman就可以添加任务栏，固定住

发送成功,同时参考它的例子，将其代码抄下来，将https改成http,这样不用ssl支持，就可以在代码中集成使用了

四、系统好像默认支持curl，可以不用编译源码安装或者命令安装，跳过源码安装直接执行下面的事例子代码执行和测试

ubuntu@ubuntu:~$ sudo apt-get install curl

或者源码下载libcurl :curl downloads

1.  
   ubuntu@ubuntu:~$ wget https://curl.se/download/curl-7.85.0.tar.gz
2.  
   ubuntu@ubuntu:~$ tar -zxvf curl-7.85.0.tar.gz
3.  
   ubuntu@ubuntu:~/curl-7.85.0$ ./configure --without-ssl
4.  
   ubuntu@ubuntu:~/curl-7.85.0$ make
5.  
   ubuntu@ubuntu:~/curl-7.85.0$ sudo make install

测试代码

cmakelists.txt

1.  
   cmake_minimum_required(VERSION 3.16)
2.  
   project(demo_curl)
3.  
    
4.  
   set(CMAKE_CXX_STANDARD 14)
5.  
    
6.  
   add_executable(demo_curl main.cpp)
7.  
   target_link_libraries(demo_curl -lcurl )

源码

1.  
   #include<stdio.h>
2.  
   #include<curl/curl.h>
3.  
   int main(int argc, char *argv[])
4.  
    
5.  
   {
6.  
   CURL *curl;
7.  
   CURLcode res;
8.  
   curl = curl_easy_init();
9.  
   if(curl) {
10.  
    curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "POST");
11.  
    curl_easy_setopt(curl, CURLOPT_URL, "192.168.10.26:8334/api/hello");
12.  
    curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
13.  
    curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "http");
14.  
    struct curl_slist *headers = NULL;
15.  
    headers = curl_slist_append(headers, "Authorization: Basic dmNoYXdsYTpIZXJlQDExMTE=");
16.  
    headers = curl_slist_append(headers, "Content-Type: application/json");
17.  
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
18.  
    const char *data = "{\"praenomen\":\"Gaius\",\"nomen\":\"Julius\",\"cognomen\":\"Caezar\",\"born\":-100,\"died\":-44}";
19.  
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
20.  
    res = curl_easy_perform(curl);
21.  
    if(res != CURLE_OK)
22.  
    fprintf(stderr, "curl_easy_perform() failed: %s\n",
23.  
    curl_easy_strerror(res));
24.  
    curl_easy_cleanup(curl);
25.  
    }
26.  
     
27.  
    curl_global_cleanup();
28.  
     
29.  
    return 0;
30.  
    }

测试结果

1.  
   /home/ubuntu/demo_curk/cmake-build-debug/demo_curl
2.  
   { "result": welcome to httpserver }
3.  
   Process finished with exit code 0

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