ElasticSearch快速入门三（curl命令讲解）

短命女 2023-07-12 05:15 109阅读 0赞

### [*API测试工具*\_*微博*开放平台][API]：[https://open.weibo.com/tools/console\#][https_open.weibo.com_tools_console]   ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70][]

感兴趣是可以使用这个工具玩一下restful接口调用，可以更形象的了解restful

### 下面我们就继续下面的内内容讲解**curl命令** ###

什么是CURL？  
就是以命令的方式来执行HTTP协议的请求的工具  
可以通过CURL操作HTTP的GET/POST/PUT/DELETE方法

下面我们就详细说下CURL这个命令的使用，这个curl命令在linux下是自带的，登陆一个linux的操作系统

我们看一下curl  --help查看帮助这个curl命令有那些参数，看到有很多

[root@backup01 java]# curl --help
    Usage: curl [options...] <url>
    Options: (H) means HTTP/HTTPS only, (F) means FTP only
         --anyauth       Pick "any" authentication method (H)
     -a, --append        Append to target file when uploading (F/SFTP)
         --basic         Use HTTP Basic Authentication (H)
         --cacert FILE   CA certificate to verify peer against (SSL)
         --capath DIR    CA directory to verify peer against (SSL)
     -E, --cert CERT[:PASSWD] Client certificate file and password (SSL)
         --cert-type TYPE Certificate file type (DER/PEM/ENG) (SSL)
         --ciphers LIST  SSL ciphers to use (SSL)
         --compressed    Request compressed response (using deflate or gzip)
     -K, --config FILE   Specify which config file to read
         --connect-timeout SECONDS  Maximum time allowed for connection
     -C, --continue-at OFFSET  Resumed transfer offset
     -b, --cookie STRING/FILE  String or file to read cookies from (H)
     -c, --cookie-jar FILE  Write cookies to this file after operation (H)
         --create-dirs   Create necessary local directory hierarchy
         --crlf          Convert LF to CRLF in upload
         --crlfile FILE  Get a CRL list in PEM format from the given file
     -d, --data DATA     HTTP POST data (H)
         --data-ascii DATA  HTTP POST ASCII data (H)
         --data-binary DATA  HTTP POST binary data (H)
         --data-urlencode DATA  HTTP POST data url encoded (H)
         --delegation STRING GSS-API delegation permission
         --digest        Use HTTP Digest Authentication (H)
         --disable-eprt  Inhibit using EPRT or LPRT (F)
         --disable-epsv  Inhibit using EPSV (F)
     -D, --dump-header FILE  Write the headers to this file
         --egd-file FILE  EGD socket path for random data (SSL)
         --engine ENGINGE  Crypto engine (SSL). "--engine list" for list
     -f, --fail          Fail silently (no output at all) on HTTP errors (H)
     -F, --form CONTENT  Specify HTTP multipart POST data (H)
         --form-string STRING  Specify HTTP multipart POST data (H)
         --ftp-account DATA  Account data string (F)
         --ftp-alternative-to-user COMMAND  String to replace "USER [name]" (F)
         --ftp-create-dirs  Create the remote dirs if not present (F)
         --ftp-method [MULTICWD/NOCWD/SINGLECWD] Control CWD usage (F)
         --ftp-pasv      Use PASV/EPSV instead of PORT (F)
     -P, --ftp-port ADR  Use PORT with given address instead of PASV (F)
         --ftp-skip-pasv-ip Skip the IP address for PASV (F)
         --ftp-pret      Send PRET before PASV (for drftpd) (F)
         --ftp-ssl-ccc   Send CCC after authenticating (F)
         --ftp-ssl-ccc-mode ACTIVE/PASSIVE  Set CCC mode (F)
         --ftp-ssl-control Require SSL/TLS for ftp login, clear for transfer (F)
     -G, --get           Send the -d data with a HTTP GET (H)
     -g, --globoff       Disable URL sequences and ranges using {} and []
     -H, --header LINE   Custom header to pass to server (H)
     -I, --head          Show document info only
     -h, --help          This help text
         --hostpubmd5 MD5  Hex encoded MD5 string of the host public key. (SSH)
     -0, --http1.0       Use HTTP 1.0 (H)
         --ignore-content-length  Ignore the HTTP Content-Length header
     -i, --include       Include protocol headers in the output (H/F)
     -k, --insecure      Allow connections to SSL sites without certs (H)
         --interface INTERFACE  Specify network interface/address to use
     -4, --ipv4          Resolve name to IPv4 address
     -6, --ipv6          Resolve name to IPv6 address
     -j, --junk-session-cookies Ignore session cookies read from file (H)
         --keepalive-time SECONDS  Interval between keepalive probes
         --key KEY       Private key file name (SSL/SSH)
         --key-type TYPE Private key file type (DER/PEM/ENG) (SSL)
         --krb LEVEL     Enable Kerberos with specified security level (F)
         --libcurl FILE  Dump libcurl equivalent code of this command line
         --limit-rate RATE  Limit transfer speed to this rate
     -l, --list-only     List only names of an FTP directory (F)
         --local-port RANGE  Force use of these local port numbers
     -L, --location      Follow redirects (H)
         --location-trusted like --location and send auth to other hosts (H)
     -M, --manual        Display the full manual
         --mail-from FROM  Mail from this address
         --mail-rcpt TO  Mail to this receiver(s)
         --mail-auth AUTH  Originator address of the original email
         --max-filesize BYTES  Maximum file size to download (H/F)
         --max-redirs NUM  Maximum number of redirects allowed (H)
     -m, --max-time SECONDS  Maximum time allowed for the transfer
         --metalink      Process given URLs as metalink XML file
         --negotiate     Use HTTP Negotiate Authentication (H)
     -n, --netrc         Must read .netrc for user name and password
         --netrc-optional Use either .netrc or URL; overrides -n
         --netrc-file FILE  Set up the netrc filename to use
     -N, --no-buffer     Disable buffering of the output stream
         --no-keepalive  Disable keepalive use on the connection
         --no-sessionid  Disable SSL session-ID reusing (SSL)
         --noproxy       List of hosts which do not use proxy
         --ntlm          Use HTTP NTLM authentication (H)
     -o, --output FILE   Write output to <file> instead of stdout
         --pass PASS     Pass phrase for the private key (SSL/SSH)
         --post301       Do not switch to GET after following a 301 redirect (H)
         --post302       Do not switch to GET after following a 302 redirect (H)
         --post303       Do not switch to GET after following a 303 redirect (H)
     -#, --progress-bar  Display transfer progress as a progress bar
         --proto PROTOCOLS  Enable/disable specified protocols
         --proto-redir PROTOCOLS  Enable/disable specified protocols on redirect
     -x, --proxy [PROTOCOL://]HOST[:PORT] Use proxy on given port
         --proxy-anyauth Pick "any" proxy authentication method (H)
         --proxy-basic   Use Basic authentication on the proxy (H)
         --proxy-digest  Use Digest authentication on the proxy (H)
         --proxy-negotiate Use Negotiate authentication on the proxy (H)
         --proxy-ntlm    Use NTLM authentication on the proxy (H)
     -U, --proxy-user USER[:PASSWORD]  Proxy user and password
         --proxy1.0 HOST[:PORT]  Use HTTP/1.0 proxy on given port
     -p, --proxytunnel   Operate through a HTTP proxy tunnel (using CONNECT)
         --pubkey KEY    Public key file name (SSH)
     -Q, --quote CMD     Send command(s) to server before transfer (F/SFTP)
         --random-file FILE  File for reading random data from (SSL)
     -r, --range RANGE   Retrieve only the bytes within a range
         --raw           Do HTTP "raw", without any transfer decoding (H)
     -e, --referer       Referer URL (H)
     -J, --remote-header-name Use the header-provided filename (H)
     -O, --remote-name   Write output to a file named as the remote file
         --remote-name-all Use the remote file name for all URLs
     -R, --remote-time   Set the remote file's time on the local output
     -X, --request COMMAND  Specify request command to use
         --resolve HOST:PORT:ADDRESS  Force resolve of HOST:PORT to ADDRESS
         --retry NUM   Retry request NUM times if transient problems occur
         --retry-delay SECONDS When retrying, wait this many seconds between each
         --retry-max-time SECONDS  Retry only within this period
     -S, --show-error    Show error. With -s, make curl show errors when they occur
     -s, --silent        Silent mode. Don't output anything
         --socks4 HOST[:PORT]  SOCKS4 proxy on given host + port
         --socks4a HOST[:PORT]  SOCKS4a proxy on given host + port
         --socks5 HOST[:PORT]  SOCKS5 proxy on given host + port
         --socks5-basic  Enable username/password auth for SOCKS5 proxies
         --socks5-gssapi Enable GSS-API auth for SOCKS5 proxies
         --socks5-hostname HOST[:PORT] SOCKS5 proxy, pass host name to proxy
         --socks5-gssapi-service NAME  SOCKS5 proxy service name for gssapi
         --socks5-gssapi-nec  Compatibility with NEC SOCKS5 server
     -Y, --speed-limit RATE  Stop transfers below speed-limit for 'speed-time' secs
     -y, --speed-time SECONDS  Time for trig speed-limit abort. Defaults to 30
         --ssl           Try SSL/TLS (FTP, IMAP, POP3, SMTP)
         --ssl-reqd      Require SSL/TLS (FTP, IMAP, POP3, SMTP)
     -2, --sslv2         Use SSLv2 (SSL)
     -3, --sslv3         Use SSLv3 (SSL)
         --ssl-allow-beast Allow security flaw to improve interop (SSL)
         --stderr FILE   Where to redirect stderr. - means stdout
         --tcp-nodelay   Use the TCP_NODELAY option
     -t, --telnet-option OPT=VAL  Set telnet option
         --tftp-blksize VALUE  Set TFTP BLKSIZE option (must be >512)
     -z, --time-cond TIME  Transfer based on a time condition
     -1, --tlsv1         Use => TLSv1 (SSL)
         --tlsv1.0       Use TLSv1.0 (SSL)
         --tlsv1.1       Use TLSv1.1 (SSL)
         --tlsv1.2       Use TLSv1.2 (SSL)
         --trace FILE    Write a debug trace to the given file
         --trace-ascii FILE  Like --trace but without the hex output
         --trace-time    Add time stamps to trace/verbose output
         --tr-encoding   Request compressed transfer encoding (H)
     -T, --upload-file FILE  Transfer FILE to destination
         --url URL       URL to work with
     -B, --use-ascii     Use ASCII/text transfer
     -u, --user USER[:PASSWORD]  Server user and password
         --tlsuser USER  TLS username
         --tlspassword STRING TLS password
         --tlsauthtype STRING  TLS authentication type (default SRP)
         --unix-socket FILE    Connect through this UNIX domain socket
     -A, --user-agent STRING  User-Agent to send to server (H)
     -v, --verbose       Make the operation more talkative
     -V, --version       Show version number and quit
     -w, --write-out FORMAT  What to output after completion
         --xattr        Store metadata in extended file attributes
     -q                 If used as the first parameter disables .curlrc
    [root@backup01 java]#

看到这么多参数，有点晕乎，其实不用背，当你用到的时候去查一下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 1][]

下面我们使用这个curl名师实际操作一下，比如我能直接访问百度

![20200307121631894.png][]

报了一个未知错误百度了一下这个问题，都说是DNS的问题，因此修改一下DNS配置，

vim /etc/resolv.conf

![20200307121909269.png][]

修改之后的

![20200307122114599.png][]

然后重新     curl www.baidu.com

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 2][]

html的页面已经成功返回

结果只是加上了`nameserver 114.114.114.114`就可以了，网上了解到的可能是电信DNS有调整的缘故，但是具体的原因还是不得而知。

如果我们要保存这个网页我们只需要命令加一个  -o   就可以了

curl -o baidu.html www.baidu.com

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 3][]

我们打开这个baidu.html看下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 4][]

curl -i www.baidu.com  显示http response请求头信息

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 5][]

curl -v www.baidu.com![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 6][]

curl --trace output.txt www.baidu.com  （把信息输入到文本中）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 7][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 8][]

cat output.txt   (查看txt文件)

[root@backup01 local]# cat output.txt 
    == Info: About to connect() to www.baidu.com port 80 (#0)
    == Info:   Trying 14.215.177.39...
    == Info: Connected to www.baidu.com (14.215.177.39) port 80 (#0)
    => Send header, 77 bytes (0x4d)
    0000: 47 45 54 20 2f 20 48 54 54 50 2f 31 2e 31 0d 0a GET / HTTP/1.1..
    0010: 55 73 65 72 2d 41 67 65 6e 74 3a 20 63 75 72 6c User-Agent: curl
    0020: 2f 37 2e 32 39 2e 30 0d 0a 48 6f 73 74 3a 20 77 /7.29.0..Host: w
    0030: 77 77 2e 62 61 69 64 75 2e 63 6f 6d 0d 0a 41 63 ww.baidu.com..Ac
    0040: 63 65 70 74 3a 20 2a 2f 2a 0d 0a 0d 0a          cept: */*....
    <= Recv header, 17 bytes (0x11)
    0000: 48 54 54 50 2f 31 2e 31 20 32 30 30 20 4f 4b 0d HTTP/1.1 200 OK.
    0010: 0a                                              .
    <= Recv header, 22 bytes (0x16)
    0000: 41 63 63 65 70 74 2d 52 61 6e 67 65 73 3a 20 62 Accept-Ranges: b
    0010: 79 74 65 73 0d 0a                               ytes..
    <= Recv header, 76 bytes (0x4c)
    0000: 43 61 63 68 65 2d 43 6f 6e 74 72 6f 6c 3a 20 70 Cache-Control: p
    0010: 72 69 76 61 74 65 2c 20 6e 6f 2d 63 61 63 68 65 rivate, no-cache
    0020: 2c 20 6e 6f 2d 73 74 6f 72 65 2c 20 70 72 6f 78 , no-store, prox
    0030: 79 2d 72 65 76 61 6c 69 64 61 74 65 2c 20 6e 6f y-revalidate, no
    0040: 2d 74 72 61 6e 73 66 6f 72 6d 0d 0a             -transform..
    <= Recv header, 24 bytes (0x18)
    0000: 43 6f 6e 6e 65 63 74 69 6f 6e 3a 20 6b 65 65 70 Connection: keep
    0010: 2d 61 6c 69 76 65 0d 0a                         -alive..
    <= Recv header, 22 bytes (0x16)
    0000: 43 6f 6e 74 65 6e 74 2d 4c 65 6e 67 74 68 3a 20 Content-Length: 
    0010: 32 33 38 31 0d 0a                               2381..
    <= Recv header, 25 bytes (0x19)
    0000: 43 6f 6e 74 65 6e 74 2d 54 79 70 65 3a 20 74 65 Content-Type: te
    0010: 78 74 2f 68 74 6d 6c 0d 0a                      xt/html..
    <= Recv header, 37 bytes (0x25)
    0000: 44 61 74 65 3a 20 53 61 74 2c 20 30 37 20 4d 61 Date: Sat, 07 Ma
    0010: 72 20 32 30 32 30 20 30 37 3a 31 31 3a 32 37 20 r 2020 07:11:27 
    0020: 47 4d 54 0d 0a                                  GMT..
    <= Recv header, 22 bytes (0x16)
    0000: 45 74 61 67 3a 20 22 35 38 38 36 30 34 64 63 2d Etag: "588604dc-
    0010: 39 34 64 22 0d 0a                               94d"..
    <= Recv header, 46 bytes (0x2e)
    0000: 4c 61 73 74 2d 4d 6f 64 69 66 69 65 64 3a 20 4d Last-Modified: M
    0010: 6f 6e 2c 20 32 33 20 4a 61 6e 20 32 30 31 37 20 on, 23 Jan 2017 
    0020: 31 33 3a 32 37 3a 35 36 20 47 4d 54 0d 0a       13:27:56 GMT..
    <= Recv header, 18 bytes (0x12)
    0000: 50 72 61 67 6d 61 3a 20 6e 6f 2d 63 61 63 68 65 Pragma: no-cache
    0010: 0d 0a                                           ..
    <= Recv header, 22 bytes (0x16)
    0000: 53 65 72 76 65 72 3a 20 62 66 65 2f 31 2e 30 2e Server: bfe/1.0.
    0010: 38 2e 31 38 0d 0a                               8.18..
    <= Recv header, 67 bytes (0x43)
    0000: 53 65 74 2d 43 6f 6f 6b 69 65 3a 20 42 44 4f 52 Set-Cookie: BDOR
    0010: 5a 3d 32 37 33 31 35 3b 20 6d 61 78 2d 61 67 65 Z=27315; max-age
    0020: 3d 38 36 34 30 30 3b 20 64 6f 6d 61 69 6e 3d 2e =86400; domain=.
    0030: 62 61 69 64 75 2e 63 6f 6d 3b 20 70 61 74 68 3d baidu.com; path=
    0040: 2f 0d 0a                                        /..
    <= Recv header, 2 bytes (0x2)
    0000: 0d 0a                                           ..
    <= Recv data, 1040 bytes (0x410)
    0000: 3c 21 44 4f 43 54 59 50 45 20 68 74 6d 6c 3e 0d <!DOCTYPE html>.
    0010: 0a 3c 21 2d 2d 53 54 41 54 55 53 20 4f 4b 2d 2d .<!--STATUS OK--
    0020: 3e 3c 68 74 6d 6c 3e 20 3c 68 65 61 64 3e 3c 6d ><html> <head><m
    0030: 65 74 61 20 68 74 74 70 2d 65 71 75 69 76 3d 63 eta http-equiv=c
    0040: 6f 6e 74 65 6e 74 2d 74 79 70 65 20 63 6f 6e 74 ontent-type cont
    0050: 65 6e 74 3d 74 65 78 74 2f 68 74 6d 6c 3b 63 68 ent=text/html;ch
    0060: 61 72 73 65 74 3d 75 74 66 2d 38 3e 3c 6d 65 74 arset=utf-8><met
    0070: 61 20 68 74 74 70 2d 65 71 75 69 76 3d 58 2d 55 a http-equiv=X-U
    0080: 41 2d 43 6f 6d 70 61 74 69 62 6c 65 20 63 6f 6e A-Compatible con
    0090: 74 65 6e 74 3d 49 45 3d 45 64 67 65 3e 3c 6d 65 tent=IE=Edge><me
    00a0: 74 61 20 63 6f 6e 74 65 6e 74 3d 61 6c 77 61 79 ta content=alway
    00b0: 73 20 6e 61 6d 65 3d 72 65 66 65 72 72 65 72 3e s name=referrer>
    00c0: 3c 6c 69 6e 6b 20 72 65 6c 3d 73 74 79 6c 65 73 <link rel=styles
    00d0: 68 65 65 74 20 74 79 70 65 3d 74 65 78 74 2f 63 heet type=text/c
    00e0: 73 73 20 68 72 65 66 3d 68 74 74 70 3a 2f 2f 73 ss href=http://s
    00f0: 31 2e 62 64 73 74 61 74 69 63 2e 63 6f 6d 2f 72 1.bdstatic.com/r
    0100: 2f 77 77 77 2f 63 61 63 68 65 2f 62 64 6f 72 7a /www/cache/bdorz
    0110: 2f 62 61 69 64 75 2e 6d 69 6e 2e 63 73 73 3e 3c /baidu.min.css><
    0120: 74 69 74 6c 65 3e e7 99 be e5 ba a6 e4 b8 80 e4 title>..........
    0130: b8 8b ef bc 8c e4 bd a0 e5 b0 b1 e7 9f a5 e9 81 ................
    0140: 93 3c 2f 74 69 74 6c 65 3e 3c 2f 68 65 61 64 3e .</title></head>
    0150: 20 3c 62 6f 64 79 20 6c 69 6e 6b 3d 23 30 30 30  <body link=#000
    0160: 30 63 63 3e 20 3c 64 69 76 20 69 64 3d 77 72 61 0cc> <div id=wra
    0170: 70 70 65 72 3e 20 3c 64 69 76 20 69 64 3d 68 65 pper> <div id=he
    0180: 61 64 3e 20 3c 64 69 76 20 63 6c 61 73 73 3d 68 ad> <div class=h
    0190: 65 61 64 5f 77 72 61 70 70 65 72 3e 20 3c 64 69 ead_wrapper> <di
    01a0: 76 20 63 6c 61 73 73 3d 73 5f 66 6f 72 6d 3e 20 v class=s_form> 
    01b0: 3c 64 69 76 20 63 6c 61 73 73 3d 73 5f 66 6f 72 <div class=s_for
    01c0: 6d 5f 77 72 61 70 70 65 72 3e 20 3c 64 69 76 20 m_wrapper> <div 
    01d0: 69 64 3d 6c 67 3e 20 3c 69 6d 67 20 68 69 64 65 id=lg> <img hide
    01e0: 66 6f 63 75 73 3d 74 72 75 65 20 73 72 63 3d 2f focus=true src=/
    01f0: 2f 77 77 77 2e 62 61 69 64 75 2e 63 6f 6d 2f 69 /www.baidu.com/i
    0200: 6d 67 2f 62 64 5f 6c 6f 67 6f 31 2e 70 6e 67 20 mg/bd_logo1.png 
    0210: 77 69 64 74 68 3d 32 37 30 20 68 65 69 67 68 74 width=270 height
    0220: 3d 31 32 39 3e 20 3c 2f 64 69 76 3e 20 3c 66 6f =129> </div> <fo
    0230: 72 6d 20 69 64 3d 66 6f 72 6d 20 6e 61 6d 65 3d rm id=form name=
    0240: 66 20 61 63 74 69 6f 6e 3d 2f 2f 77 77 77 2e 62 f action=//www.b
    0250: 61 69 64 75 2e 63 6f 6d 2f 73 20 63 6c 61 73 73 aidu.com/s class
    0260: 3d 66 6d 3e 20 3c 69 6e 70 75 74 20 74 79 70 65 =fm> <input type
    0270: 3d 68 69 64 64 65 6e 20 6e 61 6d 65 3d 62 64 6f =hidden name=bdo
    0280: 72 7a 5f 63 6f 6d 65 20 76 61 6c 75 65 3d 31 3e rz_come value=1>
    0290: 20 3c 69 6e 70 75 74 20 74 79 70 65 3d 68 69 64  <input type=hid
    02a0: 64 65 6e 20 6e 61 6d 65 3d 69 65 20 76 61 6c 75 den name=ie valu
    02b0: 65 3d 75 74 66 2d 38 3e 20 3c 69 6e 70 75 74 20 e=utf-8> <input 
    02c0: 74 79 70 65 3d 68 69 64 64 65 6e 20 6e 61 6d 65 type=hidden name
    02d0: 3d 66 20 76 61 6c 75 65 3d 38 3e 20 3c 69 6e 70 =f value=8> <inp
    02e0: 75 74 20 74 79 70 65 3d 68 69 64 64 65 6e 20 6e ut type=hidden n
    02f0: 61 6d 65 3d 72 73 76 5f 62 70 20 76 61 6c 75 65 ame=rsv_bp value
    0300: 3d 31 3e 20 3c 69 6e 70 75 74 20 74 79 70 65 3d =1> <input type=
    0310: 68 69 64 64 65 6e 20 6e 61 6d 65 3d 72 73 76 5f hidden name=rsv_
    0320: 69 64 78 20 76 61 6c 75 65 3d 31 3e 20 3c 69 6e idx value=1> <in
    0330: 70 75 74 20 74 79 70 65 3d 68 69 64 64 65 6e 20 put type=hidden 
    0340: 6e 61 6d 65 3d 74 6e 20 76 61 6c 75 65 3d 62 61 name=tn value=ba
    0350: 69 64 75 3e 3c 73 70 61 6e 20 63 6c 61 73 73 3d idu><span class=
    0360: 22 62 67 20 73 5f 69 70 74 5f 77 72 22 3e 3c 69 "bg s_ipt_wr"><i
    0370: 6e 70 75 74 20 69 64 3d 6b 77 20 6e 61 6d 65 3d nput id=kw name=
    0380: 77 64 20 63 6c 61 73 73 3d 73 5f 69 70 74 20 76 wd class=s_ipt v
    0390: 61 6c 75 65 20 6d 61 78 6c 65 6e 67 74 68 3d 32 alue maxlength=2
    03a0: 35 35 20 61 75 74 6f 63 6f 6d 70 6c 65 74 65 3d 55 autocomplete=
    03b0: 6f 66 66 20 61 75 74 6f 66 6f 63 75 73 3e 3c 2f off autofocus></
    03c0: 73 70 61 6e 3e 3c 73 70 61 6e 20 63 6c 61 73 73 span><span class
    03d0: 3d 22 62 67 20 73 5f 62 74 6e 5f 77 72 22 3e 3c ="bg s_btn_wr"><
    03e0: 69 6e 70 75 74 20 74 79 70 65 3d 73 75 62 6d 69 input type=submi
    03f0: 74 20 69 64 3d 73 75 20 76 61 6c 75 65 3d e7 99 t id=su value=..
    0400: be e5 ba a6 e4 b8 80 e4 b8 8b 20 63 6c 61 73 73 .......... class
    <= Recv data, 1341 bytes (0x53d)
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    0060: 77 73 20 63 6c 61 73 73 3d 6d 6e 61 76 3e e6 96 ws class=mnav>..
    0070: b0 e9 97 bb 3c 2f 61 3e 20 3c 61 20 68 72 65 66 ....</a> <a href
    0080: 3d 68 74 74 70 3a 2f 2f 77 77 77 2e 68 61 6f 31 =http://www.hao1
    0090: 32 33 2e 63 6f 6d 20 6e 61 6d 65 3d 74 6a 5f 74 23.com name=tj_t
    00a0: 72 68 61 6f 31 32 33 20 63 6c 61 73 73 3d 6d 6e rhao123 class=mn
    00b0: 61 76 3e 68 61 6f 31 32 33 3c 2f 61 3e 20 3c 61 av>hao123</a> <a
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    00d0: 2e 62 61 69 64 75 2e 63 6f 6d 20 6e 61 6d 65 3d .baidu.com name=
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    0100: 61 20 68 72 65 66 3d 68 74 74 70 3a 2f 2f 76 2e a href=http://v.
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    0120: 6a 5f 74 72 76 69 64 65 6f 20 63 6c 61 73 73 3d j_trvideo class=
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    0140: 3c 61 20 68 72 65 66 3d 68 74 74 70 3a 2f 2f 74 <a href=http://t
    0150: 69 65 62 61 2e 62 61 69 64 75 2e 63 6f 6d 20 6e ieba.baidu.com n
    0160: 61 6d 65 3d 74 6a 5f 74 72 74 69 65 62 61 20 63 ame=tj_trtieba c
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    0180: 3c 2f 61 3e 20 3c 6e 6f 73 63 72 69 70 74 3e 20 </a> <noscript> 
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    01a0: 77 77 2e 62 61 69 64 75 2e 63 6f 6d 2f 62 64 6f ww.baidu.com/bdo
    01b0: 72 7a 2f 6c 6f 67 69 6e 2e 67 69 66 3f 6c 6f 67 rz/login.gif?log
    01c0: 69 6e 26 61 6d 70 3b 74 70 6c 3d 6d 6e 26 61 6d in&tpl=mn&am
    01d0: 70 3b 75 3d 68 74 74 70 25 33 41 25 32 46 25 32 p;u=http%3A%2F%2
    01e0: 46 77 77 77 2e 62 61 69 64 75 2e 63 6f 6d 25 32 Fwww.baidu.com%2
    01f0: 66 25 33 66 62 64 6f 72 7a 5f 63 6f 6d 65 25 33 f%3fbdorz_come%3
    0200: 64 31 20 6e 61 6d 65 3d 74 6a 5f 6c 6f 67 69 6e d1 name=tj_login
    0210: 20 63 6c 61 73 73 3d 6c 62 3e e7 99 bb e5 bd 95  class=lb>......
    0220: 3c 2f 61 3e 20 3c 2f 6e 6f 73 63 72 69 70 74 3e </a> </noscript>
    0230: 20 3c 73 63 72 69 70 74 3e 64 6f 63 75 6d 65 6e  <script>documen
    0240: 74 2e 77 72 69 74 65 28 27 3c 61 20 68 72 65 66 t.write('<a href
    0250: 3d 22 68 74 74 70 3a 2f 2f 77 77 77 2e 62 61 69 ="http://www.bai
    0260: 64 75 2e 63 6f 6d 2f 62 64 6f 72 7a 2f 6c 6f 67 du.com/bdorz/log
    0270: 69 6e 2e 67 69 66 3f 6c 6f 67 69 6e 26 74 70 6c in.gif?login&tpl
    0280: 3d 6d 6e 26 75 3d 27 2b 20 65 6e 63 6f 64 65 55 =mn&u='+ encodeU
    0290: 52 49 43 6f 6d 70 6f 6e 65 6e 74 28 77 69 6e 64 RIComponent(wind
    02a0: 6f 77 2e 6c 6f 63 61 74 69 6f 6e 2e 68 72 65 66 ow.location.href
    02b0: 2b 20 28 77 69 6e 64 6f 77 2e 6c 6f 63 61 74 69 + (window.locati
    02c0: 6f 6e 2e 73 65 61 72 63 68 20 3d 3d 3d 20 22 22 on.search === ""
    02d0: 20 3f 20 22 3f 22 20 3a 20 22 26 22 29 2b 20 22  ? "?" : "&")+ "
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    02f0: 27 22 20 6e 61 6d 65 3d 22 74 6a 5f 6c 6f 67 69 '" name="tj_logi
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    0330: 77 77 2e 62 61 69 64 75 2e 63 6f 6d 2f 6d 6f 72 ww.baidu.com/mor
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    0390: 69 76 3e 20 3c 2f 64 69 76 3e 20 3c 64 69 76 20 iv> </div> <div 
    03a0: 69 64 3d 66 74 43 6f 6e 3e 20 3c 64 69 76 20 69 id=ftCon> <div i
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    03c0: 6c 68 3e 20 3c 61 20 68 72 65 66 3d 68 74 74 70 lh> <a href=http
    03d0: 3a 2f 2f 68 6f 6d 65 2e 62 61 69 64 75 2e 63 6f ://home.baidu.co
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    0500: 75 2e 63 6f 6d 2f 69 6d 67 2f 67 73 2e 67 69 66 u.com/img/gs.gif
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    0520: 64 69 76 3e 20 3c 2f 64 69 76 3e 20 3c 2f 62 6f div> </div> </bo
    0530: 64 79 3e 20 3c 2f 68 74 6d 6c 3e 0d 0a          dy> </html>..
    == Info: Connection #0 to host www.baidu.com left intact
    [root@backup01 local]#

curl www.baidu.com 和  curl -X GET www.baidu.com是一样的默认就是GET

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 9][]

[API]: https://www.baidu.com/link?url=Lg5KpPqblEoKaJFqNVXhBRL3svvgSAlVdKOsi6V3r99ZPXXRyoGQYwSr1QYfdASs&wd=&eqid=b751ba5200049dc6000000065e631744
[https_open.weibo.com_tools_console]: https://open.weibo.com/tools/console#
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200307120248387.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200307150153563.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw==,size_16,color_FFFFFF,t_70
[20200307121631894.png]: https://img-blog.csdnimg.cn/20200307121631894.png
[20200307121909269.png]: https://img-blog.csdnimg.cn/20200307121909269.png
[20200307122114599.png]: https://img-blog.csdnimg.cn/20200307122114599.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200307122153916.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20200307122612223.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20200307122718258.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 5]: https://img-blog.csdnimg.cn/20200307150412436.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 6]: https://img-blog.csdnimg.cn/20200307151025914.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 7]: https://img-blog.csdnimg.cn/20200307151154449.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 8]: https://img-blog.csdnimg.cn/2020030715122338.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw_size_16_color_FFFFFF_t_70 9]: https://img-blog.csdnimg.cn/20200307151729527.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3bDQ3MDgxMjA4Nw==,size_16,color_FFFFFF,t_70