curl https://domasin报错 NSS error -12286

最新推荐文章于 2022-02-19 00:29:01 发布
最新推荐文章于 2022-02-19 00:29:01 发布
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分类专栏： 运维常见问题
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本文链接：https://blog.youkuaiyun.com/weixin_41569908/article/details/88393959
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对于上面的问题怀疑是和nss版本有关，以下将分别在华南vpc和华南灰度机验证curl请求
一、在华南灰度环境测试
1、curl s3内网新域名（报错）
[root@A06-R12-302F0714-I12-86 --PROD-- ~]# curl -I https://s3-internal.cn-south-1.jdcloud-oss.com/a/a -v
* About to connect() to s3-internal.cn-south-1.jdcloud-oss.com port 443 (#0)
*   Trying 100.65.254.35...
* Connected to s3-internal.cn-south-1.jdcloud-oss.com (100.65.254.35) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* NSS error -12286 (SSL_ERROR_NO_CYPHER_OVERLAP)
* Cannot communicate securely with peer: no common encryption algorithm(s).
* Error in TLS handshake, trying SSLv3...
> HEAD /a/a HTTP/1.1
> User-Agent: curl/7.29.0
> Host: s3-internal.cn-south-1.jdcloud-oss.com
> Accept: */*
> 
* Connection died, retrying a fresh connect
* Closing connection 0
* Issue another request to this URL: 'https://s3-internal.cn-south-1.jdcloud-oss.com/a/a'
* About to connect() to s3-internal.cn-south-1.jdcloud-oss.com port 443 (#1)
*   Trying 100.65.254.35...
* Connected to s3-internal.cn-south-1.jdcloud-oss.com (100.65.254.35) port 443 (#1)
* TLS disabled due to previous handshake failure
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* NSS error -12286 (SSL_ERROR_NO_CYPHER_OVERLAP)
* Cannot communicate securely with peer: no common encryption algorithm(s).
* Closing connection 1
curl: (35) Cannot communicate securely with peer: no common encryption algorithm(s).
2、测试443端口是否开放（全部ok）
[root@A06-R12-302F0714-I12-86 --PROD-- ~]# telnet 127.0.0.1 443
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
^CConnection closed by foreign host.
[root@A06-R12-302F0714-I12-86 --PROD-- ~]# telnet 100.65.254.3 443
Trying 100.65.254.3...
Connected to 100.65.254.3.
Escape character is '^]'.
3、curl s3外网新域名 （结果ok）
[root@A06-R12-302F0714-I12-86 --PROD-- ~]# curl -I https://s3.cn-south-1.jdcloud-oss.com/a/a -v
* About to connect() to s3.cn-south-1.jdcloud-oss.com port 443 (#0)
*   Trying 59.37.144.139...
* Connected to s3.cn-south-1.jdcloud-oss.com (59.37.144.139) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSL connection using TLS_RSA_WITH_AES_128_CBC_SHA
* Server certificate:
* 	subject: CN=*.s3.cn-north-1.jdcloud-oss.com,O="BEIJING JINGDONG SHANGKE INFORMATION TECHNOLOGY CO., LTD.",L=beijing,ST=beijing,C=CN
* 	start date: Jan 29 09:31:09 2019 GMT
* 	expire date: Jan 30 09:31:09 2020 GMT
* 	common name: *.s3.cn-north-1.jdcloud-oss.com
* 	issuer: CN=GlobalSign Organization Validation CA - SHA256 - G2,O=GlobalSign nv-sa,C=BE
> HEAD /a/a HTTP/1.1
> User-Agent: curl/7.29.0
> Host: s3.cn-south-1.jdcloud-oss.com
> Accept: */*
> 
< HTTP/1.1 404 Not Found
HTTP/1.1 404 Not Found
< Server: jfe
Server: jfe
< Date: Mon, 11 Mar 2019 04:53:31 GMT
Date: Mon, 11 Mar 2019 04:53:31 GMT
< Content-Length: 0
Content-Length: 0
< Connection: keep-alive
Connection: keep-alive
< x-req-id: B6E24BAF242EF989
x-req-id: B6E24BAF242EF989

< 
* Connection #0 to host s3.cn-south-1.jdcloud-oss.com left intact
4、curl s3老域名（结果OK）
[root@A06-R12-302F0714-I12-86 --PROD-- ~]# curl -I https://s3.cn-south-1.jcloudcs.com/a/a -v
* About to connect() to s3.cn-south-1.jcloudcs.com port 443 (#0)
*   Trying 100.65.11.130...
* Connected to s3.cn-south-1.jcloudcs.com (100.65.11.130) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSL connection using TLS_RSA_WITH_AES_128_CBC_SHA
* Server certificate:
* 	subject: CN=*.jdcloud.com,O="BEIJING JINGDONG SHANGKE INFORMATION TECHNOLOGY CO., LTD.",L=beijing,ST=beijing,C=CN
* 	start date: Nov 19 02:26:04 2018 GMT
* 	expire date: Feb 18 09:06:02 2020 GMT
* 	common name: *.jdcloud.com
* 	issuer: CN=GlobalSign Organization Validation CA - SHA256 - G2,O=GlobalSign nv-sa,C=BE
> HEAD /a/a HTTP/1.1
> User-Agent: curl/7.29.0
> Host: s3.cn-south-1.jcloudcs.com
> Accept: */*
> 
< HTTP/1.1 404 Not Found
HTTP/1.1 404 Not Found
< Server: JDCloudOSS
Server: JDCloudOSS
< Date: Mon, 11 Mar 2019 04:53:46 GMT
Date: Mon, 11 Mar 2019 04:53:46 GMT
< Content-Length: 0
Content-Length: 0
< Connection: close
Connection: close
< x-req-id: 8228B04708806DDF
x-req-id: 8228B04708806DDF

< 
* Closing connection 0
二、华南vpc中测试
1、curl s3内网新域名（ok），测试其它域名也ok这里就不全贴了
[root@domain-cn-south-1 ~]# curl -I https://s3-internal.cn-south-1.jdcloud-oss.com/a/a -v
* About to connect() to s3-internal.cn-south-1.jdcloud-oss.com port 443 (#0)
*   Trying 100.65.254.35...
* Connected to s3-internal.cn-south-1.jdcloud-oss.com (100.65.254.35) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSL connection using TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
* Server certificate:
*   subject: CN=*.s3.cn-north-1.jdcloud-oss.com,O="BEIJING JINGDONG SHANGKE INFORMATION TECHNOLOGY CO., LTD.",L=beijing,ST=beijing,C=CN
*   start date: Jan 29 09:31:09 2019 GMT
*   expire date: Jan 30 09:31:09 2020 GMT
*   common name: *.s3.cn-north-1.jdcloud-oss.com
*   issuer: CN=GlobalSign Organization Validation CA - SHA256 - G2,O=GlobalSign nv-sa,C=BE
> HEAD /a/a HTTP/1.1
> User-Agent: curl/7.29.0
> Host: s3-internal.cn-south-1.jdcloud-oss.com
> Accept: */*
> 
< HTTP/1.1 404 Not Found
HTTP/1.1 404 Not Found
< Server: JDCloudOSS
Server: JDCloudOSS
< Date: Mon, 11 Mar 2019 05:13:33 GMT
Date: Mon, 11 Mar 2019 05:13:33 GMT
< Content-Length: 0
Content-Length: 0
< Connection: keep-alive
Connection: keep-alive
< x-req-id: 828EF8FED8952127
x-req-id: 828EF8FED8952127

< 
* Connection #0 to host s3-internal.cn-south-1.jdcloud-oss.com left intact
三、通过以上测试怀疑是nss版本问题导致无法加载新的证书
1、检查nss版本（华南灰度机nss版本低）

华南灰度机

[root@A06-R12-302F0714-I12-86 --PROD-- ~]# curl -V
curl 7.29.0 (x86_64-redhat-linux-gnu) libcurl/7.29.0 NSS/3.15.4 zlib/1.2.7 libidn/1.28 libssh2/1.4.3
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smtp smtps telnet tftp 
Features: AsynchDNS GSS-Negotiate IDN IPv6 Largefile NTLM NTLM_WB SSL libz 
[root@A06-R12-302F0714-I12-86 --PROD-- ~]# rpm -qa | grep nss
openssh-server-6.6.1p1-11.el7.x86_64
nss-softokn-freebl-3.16.2.3-9.el7.x86_64
nss-util-3.16.2.3-2.el7.x86_64
openssl-1.0.1e-42.el7.x86_64
openssh-clients-6.6.1p1-11.el7.x86_64
nss-tools-3.16.2.3-5.el7.x86_64
nss-3.16.2.3-5.el7.x86_64
nss-sysinit-3.16.2.3-5.el7.x86_64
jansson-2.4-6.el7.x86_64
openssh-6.6.1p1-11.el7.x86_64
nss-softokn-3.16.2.3-9.el7.x86_64
libsss_nss_idmap-1.12.2-58.el7.x86_64
openssl-devel-1.0.1e-42.el7.x86_64
openssl-libs-1.0.1e-42.el7.x86_64

华南vpc

[root@domain-cn-south-1 ~]# curl -V
curl 7.29.0 (x86_64-redhat-linux-gnu) libcurl/7.29.0 NSS/3.34 zlib/1.2.7 libidn/1.28 libssh2/1.4.3
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smtp smtps telnet tftp 
Features: AsynchDNS GSS-Negotiate IDN IPv6 Largefile NTLM NTLM_WB SSL libz unix-sockets 
[root@domain-cn-south-1 ~]# rpm -qa | grep nss
nss-3.36.0-5.el7_5.x86_64
jansson-2.10-1.el7.x86_64
nss-util-3.36.0-1.el7_5.x86_64
nss-pem-1.0.3-4.el7.x86_64
openssl-1.0.2k-12.el7.x86_64
nss-sysinit-3.36.0-5.el7_5.x86_64
nss-tools-3.36.0-5.el7_5.x86_64
openssh-clients-7.4p1-16.el7.x86_64
nss-softokn-freebl-3.36.0-5.el7_5.x86_64
nss-softokn-3.36.0-5.el7_5.x86_64
openssl-libs-1.0.2k-12.el7.x86_64
openssh-7.4p1-16.el7.x86_64
libsss_nss_idmap-1.16.0-19.el7_5.5.x86_64
openssh-server-7.4p1-16.el7.x86_64
四、更新华南灰度机nss版本
1、
[root@A06-R12-302F0714-I12-86 --PROD-- ~]# yum update nss
Loaded plugins: fastestmirror, langpacks
Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
base                                                                                                                                                                  | 3.6 kB  00:00:00     
extras                                                                                                                                                                | 3.4 kB  00:00:00     
updates                                                                                                                                                               | 3.4 kB  00:00:00     
(1/2): extras/7/x86_64/primary_db                                                                                                                                     | 180 kB  00:00:00     
(2/2): updates/7/x86_64/primary_db                                                                                                                                    | 2.5 MB  00:00:00     
Determining fastest mirrors
Resolving Dependencies
--> Running transaction check
---> Package nss.x86_64 0:3.16.2.3-5.el7 will be updated
--> Processing Dependency: nss = 3.16.2.3-5.el7 for package: nss-sysinit-3.16.2.3-5.el7.x86_64
--> Processing Dependency: nss(x86-64) = 3.16.2.3-5.el7 for package: nss-tools-3.16.2.3-5.el7.x86_64
---> Package nss.x86_64 0:3.36.0-7.1.el7_6 will be an update
--> Processing Dependency: nss-util >= 3.36.0-1.1 for package: nss-3.36.0-7.1.el7_6.x86_64
--> Processing Dependency: nss-softokn(x86-64) >= 3.36.0-1 for package: nss-3.36.0-7.1.el7_6.x86_64
--> Processing Dependency: nspr >= 4.19.0 for package: nss-3.36.0-7.1.el7_6.x86_64
--> Processing Dependency: nss-pem(x86-64) for package: nss-3.36.0-7.1.el7_6.x86_64
--> Processing Dependency: libnssutil3.so(NSSUTIL_3.31)(64bit) for package: nss-3.36.0-7.1.el7_6.x86_64
--> Processing Dependency: libnssutil3.so(NSSUTIL_3.24)(64bit) for package: nss-3.36.0-7.1.el7_6.x86_64
--> Processing Dependency: libnssutil3.so(NSSUTIL_3.21)(64bit) for package: nss-3.36.0-7.1.el7_6.x86_64
--> Running transaction check
---> Package nspr.x86_64 0:4.10.6-3.el7 will be updated
---> Package nspr.x86_64 0:4.19.0-1.el7_5 will be an update
---> Package nss-pem.x86_64 0:1.0.3-5.el7 will be installed
---> Package nss-softokn.x86_64 0:3.16.2.3-9.el7 will be updated
---> Package nss-softokn.x86_64 0:3.36.0-5.el7_5 will be an update
--> Processing Dependency: nss-softokn-freebl(x86-64) >= 3.36.0-5.el7_5 for package: nss-softokn-3.36.0-5.el7_5.x86_64
---> Package nss-sysinit.x86_64 0:3.16.2.3-5.el7 will be updated
---> Package nss-sysinit.x86_64 0:3.36.0-7.1.el7_6 will be an update
---> Package nss-tools.x86_64 0:3.16.2.3-5.el7 will be updated
---> Package nss-tools.x86_64 0:3.36.0-7.1.el7_6 will be an update
---> Package nss-util.x86_64 0:3.16.2.3-2.el7 will be updated
---> Package nss-util.x86_64 0:3.36.0-1.1.el7_6 will be an update
--> Running transaction check
---> Package nss-softokn-freebl.x86_64 0:3.16.2.3-9.el7 will be updated
---> Package nss-softokn-freebl.x86_64 0:3.36.0-5.el7_5 will be an update
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================================================================================================
 Package                                            Arch                                   Version                                             Repository                               Size
=============================================================================================================================================================================================
Updating:
 nss                                                x86_64                                 3.36.0-7.1.el7_6                                    updates                                 835 k
Installing for dependencies:
 nss-pem                                            x86_64                                 1.0.3-5.el7                                         base                                     74 k
Updating for dependencies:
 nspr                                               x86_64                                 4.19.0-1.el7_5                                      base                                    127 k
 nss-softokn                                        x86_64                                 3.36.0-5.el7_5                                      base                                    315 k
 nss-softokn-freebl                                 x86_64                                 3.36.0-5.el7_5                                      base                                    222 k
 nss-sysinit                                        x86_64                                 3.36.0-7.1.el7_6                                    updates                                  62 k
 nss-tools                                          x86_64                                 3.36.0-7.1.el7_6                                    updates                                 515 k
 nss-util                                           x86_64                                 3.36.0-1.1.el7_6                                    updates                                  78 k

Transaction Summary
=============================================================================================================================================================================================
Install             ( 1 Dependent package)
Upgrade  1 Package  (+6 Dependent packages)

Total download size: 2.2 M
Is this ok [y/d/N]: y
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
(1/8): nspr-4.19.0-1.el7_5.x86_64.rpm                                                                                                                                 | 127 kB  00:00:00     
(2/8): nss-pem-1.0.3-5.el7.x86_64.rpm                                                                                                                                 |  74 kB  00:00:00     
(3/8): nss-softokn-freebl-3.36.0-5.el7_5.x86_64.rpm                                                                                                                   | 222 kB  00:00:00     
(4/8): nss-softokn-3.36.0-5.el7_5.x86_64.rpm                                                                                                                          | 315 kB  00:00:00     
(5/8): nss-3.36.0-7.1.el7_6.x86_64.rpm                                                                                                                                | 835 kB  00:00:00     
(6/8): nss-tools-3.36.0-7.1.el7_6.x86_64.rpm                                                                                                                          | 515 kB  00:00:00     
(7/8): nss-sysinit-3.36.0-7.1.el7_6.x86_64.rpm                                                                                                                        |  62 kB  00:00:00     
(8/8): nss-util-3.36.0-1.1.el7_6.x86_64.rpm                                                                                                                           |  78 kB  00:00:00     
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                                        4.6 MB/s | 2.2 MB  00:00:00     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Updating   : nspr-4.19.0-1.el7_5.x86_64                                                                                                                                               1/15 
/sbin/ldconfig: /usr/local/lib/libpcreposix.so.0 is not a symbolic link

  Updating   : nss-util-3.36.0-1.1.el7_6.x86_64                                                                                                                                         2/15 
/sbin/ldconfig: /usr/local/lib/libpcreposix.so.0 is not a symbolic link

  Updating   : nss-softokn-freebl-3.36.0-5.el7_5.x86_64                                                                                                                                 3/15 
  Updating   : nss-softokn-3.36.0-5.el7_5.x86_64                                                                                                                                        4/15 
/sbin/ldconfig: /usr/local/lib/libpcreposix.so.0 is not a symbolic link

  Installing : nss-pem-1.0.3-5.el7.x86_64                                                                                                                                               5/15 
  Updating   : nss-sysinit-3.36.0-7.1.el7_6.x86_64                                                                                                                                      6/15 
  Updating   : nss-3.36.0-7.1.el7_6.x86_64                                                                                                                                              7/15 
/sbin/ldconfig: /usr/local/lib/libpcreposix.so.0 is not a symbolic link

  Updating   : nss-tools-3.36.0-7.1.el7_6.x86_64                                                                                                                                        8/15 
  Cleanup    : nss-tools-3.16.2.3-5.el7.x86_64                                                                                                                                          9/15 
  Cleanup    : nss-sysinit-3.16.2.3-5.el7.x86_64                                                                                                                                       10/15 
  Cleanup    : nss-3.16.2.3-5.el7.x86_64                                                                                                                                               11/15 
/sbin/ldconfig: /usr/local/lib/libpcreposix.so.0 is not a symbolic link

  Cleanup    : nss-softokn-3.16.2.3-9.el7.x86_64                                                                                                                                       12/15 
/sbin/ldconfig: /usr/local/lib/libpcreposix.so.0 is not a symbolic link

  Cleanup    : nss-util-3.16.2.3-2.el7.x86_64                                                                                                                                          13/15 
/sbin/ldconfig: /usr/local/lib/libpcreposix.so.0 is not a symbolic link

  Cleanup    : nspr-4.10.6-3.el7.x86_64                                                                                                                                                14/15 
/sbin/ldconfig: /usr/local/lib/libpcreposix.so.0 is not a symbolic link

  Cleanup    : nss-softokn-freebl-3.16.2.3-9.el7.x86_64                                                                                                                                15/15 
  Verifying  : nss-3.36.0-7.1.el7_6.x86_64                                                                                                                                              1/15 
  Verifying  : nss-pem-1.0.3-5.el7.x86_64                                                                                                                                               2/15 
  Verifying  : nss-tools-3.36.0-7.1.el7_6.x86_64                                                                                                                                        3/15 
  Verifying  : nspr-4.19.0-1.el7_5.x86_64                                                                                                                                               4/15 
  Verifying  : nss-sysinit-3.36.0-7.1.el7_6.x86_64                                                                                                                                      5/15 
  Verifying  : nss-softokn-freebl-3.36.0-5.el7_5.x86_64                                                                                                                                 6/15 
  Verifying  : nss-util-3.36.0-1.1.el7_6.x86_64                                                                                                                                         7/15 
  Verifying  : nss-softokn-3.36.0-5.el7_5.x86_64                                                                                                                                        8/15 
  Verifying  : nss-softokn-freebl-3.16.2.3-9.el7.x86_64                                                                                                                                 9/15 
  Verifying  : nss-util-3.16.2.3-2.el7.x86_64                                                                                                                                          10/15 
  Verifying  : nss-sysinit-3.16.2.3-5.el7.x86_64                                                                                                                                       11/15 
  Verifying  : nss-tools-3.16.2.3-5.el7.x86_64                                                                                                                                         12/15 
  Verifying  : nss-softokn-3.16.2.3-9.el7.x86_64                                                                                                                                       13/15 
  Verifying  : nss-3.16.2.3-5.el7.x86_64                                                                                                                                               14/15 
  Verifying  : nspr-4.10.6-3.el7.x86_64                                                                                                                                                15/15 

Dependency Installed:
  nss-pem.x86_64 0:1.0.3-5.el7                                                                                                                                                               

Updated:
  nss.x86_64 0:3.36.0-7.1.el7_6                                                                                                                                                              

Dependency Updated:
  nspr.x86_64 0:4.19.0-1.el7_5                nss-softokn.x86_64 0:3.36.0-5.el7_5         nss-softokn-freebl.x86_64 0:3.36.0-5.el7_5         nss-sysinit.x86_64 0:3.36.0-7.1.el7_6        
  nss-tools.x86_64 0:3.36.0-7.1.el7_6         nss-util.x86_64 0:3.36.0-1.1.el7_6         

Complete!
2、重新测试华南内网新域名OK
[root@A06-R12-302F0714-I12-86 --PROD-- ~]# curl -I https://s3-internal.cn-south-1.jdcloud-oss.com/a/a -v
* About to connect() to s3-internal.cn-south-1.jdcloud-oss.com port 443 (#0)
*   Trying 100.65.254.3...
* Connected to s3-internal.cn-south-1.jdcloud-oss.com (100.65.254.3) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSL connection using TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
* Server certificate:
* 	subject: CN=*.s3.cn-north-1.jdcloud-oss.com,O="BEIJING JINGDONG SHANGKE INFORMATION TECHNOLOGY CO., LTD.",L=beijing,ST=beijing,C=CN
* 	start date: Jan 29 09:31:09 2019 GMT
* 	expire date: Jan 30 09:31:09 2020 GMT
* 	common name: *.s3.cn-north-1.jdcloud-oss.com
* 	issuer: CN=GlobalSign Organization Validation CA - SHA256 - G2,O=GlobalSign nv-sa,C=BE
> HEAD /a/a HTTP/1.1
> User-Agent: curl/7.29.0
> Host: s3-internal.cn-south-1.jdcloud-oss.com
> Accept: */*
> 
< HTTP/1.1 404 Not Found
HTTP/1.1 404 Not Found
< Server: JDCloudOSS
Server: JDCloudOSS
< Date: Mon, 11 Mar 2019 04:54:29 GMT
Date: Mon, 11 Mar 2019 04:54:29 GMT
< Content-Length: 0
Content-Length: 0
< Connection: keep-alive
Connection: keep-alive
< x-req-id: ABE7F53066B4B389
x-req-id: ABE7F53066B4B389

< 
* Connection #0 to host s3-internal.cn-south-1.jdcloud-oss.com left intact
  • 结论：nss版本问题导致curl报错
  • 处理方法：yum update nss
浏览器控制台命令指南-重制版
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开发人员的调试控制台多年来一直在 Web 浏览器中以一种或另一种形式提供。最初是作为向开发人员报告错误的一种手段，其功能在许多方面都有所提高;例如自动记录网络请求、网络响应、安全错误或警告等信息。网站的 JavaScript 还有一种方法可以触发输出到控制台以进行调试的各种命令。这些命令包含在几乎每个浏览器中都可用的控制台对象中。尽管这些功能在浏览器之间基本一致，但也存在一些差异。其中一些差异本质上只是视觉上的，而另一些确实有轻微的功能差异需要牢记。以下是本篇文章正文内容。
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浏览器console，web自动化常用的几种定位调试使用方法总结
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Chrome 控制台console的用法
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 Chrome 控制台console的用法 下面我们来看看console里面具体提供了哪些方法可以供我们平时调试时使用。 目前控制台方法和属性有： ["$$", "$x", "dir", "dirxml", "keys", "values", "profile", "profileEnd", "monitorEvents", "unmonitorEvents", "inspec
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