这篇文章主要讲解了“如何获取站点的各类响应时间”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“如何获取站点的各类响应时间”吧！
有时候为了测试网络情况，需要返回每个阶段的耗时时间，比如DNS解析耗时，建立连接所消耗的时间，从建立连接到准备传输所使用的时间，从建立连接到传输开始所使用的时间，整个过程耗时，下载的数据量，下载速度，上传数据量，上传速度等等。下面的脚本获取以上信息：
代码如下:
###################################
### author: www.ttlsa.com ###
### QQ群: 39514058 ###
### E-mail: service@ttlsa.com ###
###################################
use strict;
use Data::Dumper;
use WWW::Curl::Easy;
if(!@ARGV){
print "Usaging: $0 url\n";
print "For example: $0 www.ttlsa.com\n";
exit;
}
my $curl = new WWW::Curl::Easy;
open my $response_body,">/dev/null";
$curl->setopt(CURLOPT_HEADER,1);
$curl->setopt(CURLOPT_URL, $ARGV[0]);
$curl->setopt(CURLOPT_WRITEDATA,\$response_body);
$curl->perform;
my $err = $curl->errbuf;
if(!$err){
my $st = &getTime;
my $http_code = $curl->getinfo(CURLINFO_RESPONSE_CODE);
my $http_dns_time = $curl->getinfo(CURLINFO_NAMELOOKUP_TIME);
my $http_conn_time = $curl->getinfo(CURLINFO_CONNECT_TIME);
#my $http_APP_time = $curl->getinfo(CURLINFO_APPCONNECT_TIME);
my $http_PRE_TRAN_time = $curl->getinfo(CURLINFO_PRETRANSFER_TIME);
my $http_START_TRAN_time = $curl->getinfo(CURLINFO_STARTTRANSFER_TIME);
my $http_TOTAL_time = $curl->getinfo(CURLINFO_TOTAL_TIME);
my $http_SIZE_DOWN = $curl->getinfo(CURLINFO_SIZE_DOWNLOAD);
my $http_SPEED_DOWN = $curl->getinfo(CURLINFO_SPEED_DOWNLOAD);
printf "local_time: %s, http_code: %d, dns_time: %.3fms, conn_time: %.3fms, pre_tran_time: %.3fms, start_tran_time: %.3fms, total_time: %.3fms, size_download: %dB, speed_download: %dB/s",($st,$http_code,$http_dns_time,$http_conn_time,$http_PRE_TRAN_time,$http_START_TRAN_time,$http_TOTAL_time,$http_SIZE_DOWN,$http_SPEED_DOWN);
write;
format STDOUT_TOP=
站点各类响应时间明细-@||
$%
=========================
+---------------------+------+-------------+--------------+--------------------------+------------------------+-------------+-----------+------------+
| 本地时间 | 状态 | DNS解析时间 | 建立连接时间 | 从建立连接到准备传输时间 |从建立连接到开始传输时间| 整个过程时间| 下载数据量|平均下载速度|
+---------------------+------+-------------+--------------+--------------------------+------------------------+-------------+-----------+------------+
.
format STDOUT=
|@<<<<<<<<<<<<<<<<<<<<| @<<<<| @<<<<<<<<<<<| @<<<<<<<<<<<<| @<<<<<<<<<<<<<<<<<<<<<<<<| @<<<<<<<<<<<<<<<<<<<<<<| @<<<<<<<<<<<| @<<<<<<<<<| @<<<<<<<<<<|
$st,$http_code,$http_dns_time."ms",$http_conn_time."ms",$http_PRE_TRAN_time."ms",$http_START_TRAN_time."ms",$http_TOTAL_time."ms",$http_SIZE_DOWN."B",$http_SPEED_DOWN."B/s"
+---------------------+------+-------------+--------------+--------------------------+------------------------+--------------+----------+------------+
.
}else{
print "Error: $err\n";
}
sub getTime()
{
my @time=(localtime)[5,4,3,2,1,0];
$time[0]+=1900;
$time[1]+=1;
return sprintf("%04u-%02u-%02u %02u:%02u:%02u",@time);
}
shell命令下也有相同的命令如下所示：
代码如下:
# curl -o /dev/null -s -w %{http_code}:%{http_connect}:%{time_namelookup}:%{time_connect}:%{time_pretransfer}:%{time_starttransfer}:%{time_total}:%{size_download}:%{speed_download} www.ttlsa.com
使用 cURL 获取站点的各类响应时间 – dns解析时间,响应时间,传输时间
代码如下:
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} digdeeply.org
这是一个本人博客站点执行 curl 命令的情况。输出通常是 HTML 代码，通过 -o 参数发送到 /dev/null。-s 参数去掉所有状态信息。-w 参数让 curl 输出的计时器的状态信息。
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, in seconds, 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, in seconds, 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, in seconds, 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, in seconds, 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, in seconds, 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, in seconds, 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.
感谢各位的阅读，以上就是“如何获取站点的各类响应时间”的内容了，经过本文的学习后，相信大家对如何获取站点的各类响应时间这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是创新互联网站建设公司，，小编将为大家推送更多相关知识点的文章，欢迎关注！
