有時候為了測試網路情況，需要返回每個階段的耗時時間，比如DNS解析耗時，建立串連所消耗的時間，從建立串連到準備傳輸所使用的時間，從建立串連到傳輸開始所使用的時間，整個過程耗時，下載的資料量，下載速度，上傳資料量，上傳速度等等。下面的指令碼擷取以上資訊：
CURL的資料參見： http://curl.haxx.se/libcurl/c/curl_easy_getinfo.html
複製代碼 代碼如下:
###################################
### 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=
網站各類回應時間明細-@||
$%
=========================
+---------------------+------+-------------+--------------+--------------------------+------------------------+-------------+-----------+------------+
| 本地時間 | 狀態 | DNS解析時間 | 建立連線時間 | 從建立串連到準備傳輸時間 |從建立串連到開始傳輸時間| 整個過程時間| 下載資料量|平均下載速度|
+---------------------+------+-------------+--------------+--------------------------+------------------------+-------------+-----------+------------+
.
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);
}
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shell命令下也有相同的命令如下所示：
複製代碼 代碼如下:
# 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
不解釋了，具體參見 man curl
使用 cURL 擷取網站的各類回應時間 – dns解析時間,回應時間,傳輸時間
複製代碼 代碼如下:
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
這是一個本人部落格網站執行 curl 命令的情況。輸出通常是 HTML 程式碼，通過 -o 參數發送到 /dev/null。-s 參數去掉所有狀態資訊。-w 參數讓 curl 輸出的計時器的狀態資訊。
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一次http請求中的各個時間段-dns解析,等待伺服器響應,擷取內容等
下邊對-w參數做個詳細的解釋，由我(DigDeeply)翻譯。有不對的地方請大家指出。(英文原文：http://curl.haxx.se/docs/manpage.html)
以下是可用的變數名：
-w, --write-out
以下變數會按CURL認為合適的格式輸出，輸出變數需要按照%{variable_name}的格式，如果需要輸出%，double一下即可，即%%，同時，\n是換行，\r是斷行符號，\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狀態代碼，如200成功,301轉向,404未找到,500伺服器錯誤等。(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 總時間，按秒計。精確到小數點後三位。 （The total time, in seconds, that the full operation lasted. The time will be displayed with millisecond resolution.）
time_namelookup DNS解析時間,從請求開始到DNS解析完畢所用時間。(The time, in seconds, it took from the start until the name resolving was completed.)
time_connect 連線時間,從開始到建立TCP串連完成所用時間,包括前邊DNS解析時間，如果需要單純的得到連線時間，用這個time_connect時間減去前邊time_namelookup時間。以下同理，不再贅述。(The time, in seconds, it took from the start until the TCP connect to the remote host (or proxy) was completed.)
time_appconnect 串連建立完成時間，如SSL/SSH等建立串連或者完成三向交握時間。(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 從開始到準備傳輸的時間。(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 重新導向時間，包括到最後一次傳輸前的幾次重新導向的DNS解析，串連，預傳輸，傳輸時間。(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 開始傳輸時間。在發出請求之後，Web 服務器返回資料的第一個位元組所用的時間(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 下載大小。(The total amount of bytes that were downloaded.)
size_upload 上傳大小。(The total amount of bytes that were uploaded.)
size_header 下載的header的大小(The total amount of bytes of the downloaded headers.)
size_request 請求的大小。(The total amount of bytes that were sent in the HTTP request.)
speed_download 下載速度，單位-位元組每秒。(The average download speed that curl measured for the complete download. Bytes per second.)
speed_upload 上傳速度,單位-位元組每秒。(The average upload speed that curl measured for the complete upload. Bytes per second.)
content_type 就是content-Type，不用多說了，這是一個訪問我部落格首頁返回的結果樣本(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認證結果，返回0表示認證成功。( 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參數，按最後一個的格式輸出。If this option is used several times, the last one will be used.
