curl命令获取站点的各类响应时间

curl -o /dev/null -s -w %{http_code}:%{http_connect}:%{content_type}:%{time_namelookup}:%{time_redirect}:%{time_pretransfer}:%{time_connect}:%{time_starttransfer}:%{time_total}:%{speed_download} http://www.baidu.com

?

一次http请求中的各个时间段-dns解析,等待服务器响应,获取内容等?
下边对-w参数做个详细的解释，由我(DigDeeply)翻译。有不对的地方请大家指出。(英文原文：http://curl.haxx.se/docs/manpage.html)?
以下是可用的变量名：?

　-w,--write-out?
　以下变量会按CURL认为合适的格式输出，输出变量需要按照%{variable_name}的格式，如果需要输出%，double一下即可，即%%，同时，n是换行，r是回车，t是TAB。?

url_effective The URL that was fetched last. This is most meaningful if you‘ve told curl to follow location: headers.?

filename_effective The ultimate filename that curl writes out to. This is only meaningful if curl is told to write to a file with the --remote-name or --output option. It‘s most useful in combination with the --remote-header-name option. (Added in 7.25.1)?

http_code http状态码，如200成功,301转向,404未找到,500服务器错误等。(The numerical response code that was found in the last retrieved HTTP(S) or FTP(s) transfer. In 7.18.2 the alias response_code was added to show the same info.)?

http_connect The numerical code that was found in the last response (from a proxy) to a curl CONNECT request. (Added in 7.12.4)?

time_total 总时间，按秒计。精确到小数点后三位。 （The total time,in seconds,that the full operation lasted. The time will be displayed with millisecond resolution.）?

time_namelookup DNS解析时间,从请求开始到DNS解析完毕所用时间。(The time,it took from the start until the name resolving was completed.)?

time_connect 连接时间,从开始到建立TCP连接完成所用时间,包括前边DNS解析时间，如果需要单纯的得到连接时间，用这个time_connect时间减去前边time_namelookup时间。以下同理，不再赘述。(The time,it took from the start until the TCP connect to the remote host (or proxy) was completed.)?

time_appconnect 连接建立完成时间，如SSL/SSH等建立连接或者完成三次握手时间。(The time,it took from the start until the SSL/SSH/etc connect/handshake to the remote host was completed. (Added in 7.19.0))?

time_pretransfer 从开始到准备传输的时间。(The time,it took from the start until the file transfer was just about to begin. This includes all pre-transfer commands and negotiations that are specific to the particular protocol(s) involved.)?

time_redirect 重定向时间，包括到最后一次传输前的几次重定向的DNS解析，连接，预传输，传输时间。(The time,it took for all redirection steps include name lookup,connect,pretransfer and transfer before the final transaction was started. time_redirect shows the complete execution time for multiple redirections. (Added in 7.12.3))?

time_starttransfer 开始传输时间。在发出请求之后，Web 服务器返回数据的第一个字节所用的时间(The time,it took from the start until the first byte was just about to be transferred. This includes time_pretransfer and also the time the server needed to calculate the result.)?

size_download 下载大小。(The total amount of bytes that were downloaded.)?

size_upload 上传大小。(The total amount of bytes that were uploaded.)?

size_header 下载的header的大小(The total amount of bytes of the downloaded headers.)?

size_request 请求的大小。(The total amount of bytes that were sent in the HTTP request.)?

speed_download 下载速度，单位-字节每秒。(The average download speed that curl measured for the complete download. Bytes per second.)?

speed_upload 上传速度,单位-字节每秒。(The average upload speed that curl measured for the complete upload. Bytes per second.)?

content_type 就是content-Type，不用多说了，这是一个访问我博客首页返回的结果示例(text/html; charset=UTF-8)；(The Content-Type of the requested document,if there was any.)?

num_connects Number of new connects made in the recent transfer. (Added in 7.12.3)?

num_redirects Number of redirects that were followed in the request. (Added in 7.12.3)?

redirect_url When a HTTP request was made without -L to follow redirects,this variable will show the actual URL a redirect would take you to. (Added in 7.18.2)?

ftp_entry_path The initial path libcurl ended up in when logging on to the remote FTP server. (Added in 7.15.4)?

ssl_verify_result ssl认证结果，返回0表示认证成功。( The result of the SSL peer certificate verification that was requested. 0 means the verification was successful. (Added in 7.19.0))?

若多次使用-w参数，按最后一个的格式输出。If this option is used several times,the last one will be used.

?

文章转载自https://www.cnblogs.com/dawq/p/7661036.html