Curl--connect-timeout Judging the network Windows batch processing at home and abroad

1. Download the compiled Curl

curl:http://curl.haxx.se/download.html, download and unzip to a directory, use the "Visual Studio Command Prompt (2010)" In the VS developer tool to open the command line,

Switch to source directory F:\curl-7.46.0\winbuild\, use the command nmake/f MAKEFILE.VC mode=static compile, in F:\curl-7.46.0\builds\ Generate the Curl.exe file under the Libcurl-vc-x86-release-static-ipv6-sspi-winssl\bin directory.

Open the command line switch to the Curl.exe directory to view version curl-v

Curl 7.46.0 (i386-pc-win32) libcurl/7.46.0 Winssl winidn
Protocols:dict file ftp FTPs Gopher http HTTPS IMAP imaps LDAP POP3 pop3s RTSP
SMB SMBs SMTP Smtps telnet tftp
Features:asynchdns IDN IPv6 largefile SSPI Kerberos SPNEGO NTLM SSL

If curl appears when using curl: (1) Protocol HTTPS not supported or disabled in Libcurl error, first check whether the Curl.exe supported HTTPS protocol.

2. There is a code snippet based on Curl--connect-timeout https://google.com return value to determine if it is a domestic network

Link Address: https://www.zhihu.com/question/30262900

# Guess your location, you know it.

location= ' Oversea '

Curl--connect-timeout 1 https://google.com 2>&1 >/dev/null

Ret=$? If [$ret-ne 0]; Then

Location= ' CN '

Else

.......

Here to translate a window under batch processing version

@echo Offset location='oversea'Echo 'Current Location:%location%'Echo 'Visit http://www.baidu.com'REM-x Set agent REM--connect-timeout1The connection timed out 1 seconds, the command normal execution result is 1 refers to the STDOUT standard output, the REM is the console output, 2 refers to the stderr error output, here2>$ = Redirect to 1,rem and then redirect to Null,linux is/dev/NULL, under Windows is nul. Curl-X"http://192.168.0.6:8080"--connect-timeout1 "http://www.baidu.com" 2>$1>nulrem ERRORLEVEL is a system variable that refers to the execution result of the previous statement, which equals 0 on successEcho 'result%errorlevel%'Echo 'Visit https://google.com'Curl-X"http://192.168.0.6:8080"--connect-timeout1 "https://google.com" 2>$1>Nulrem Here is 56, the complete message is curl: ( About) Proxy CONNECT aborted due to timeoutEcho 'result%errorlevel%'IF not errorlevel0  Then(Set location='CN')   Echo 'Current Location:%location%'    

Curl--connect-timeout Judging the network Windows batch processing at home and abroad