ab -n  -c  https://www.baidu.com/

ab -n  -c  -H 'Accept-Encoding: gzip' -H 'storeId: 12' https://www.baidu.com/?a=1&b=2

ab -n  -c   -p "post.txt" -T "application/json" -H "Content-Type: application/json"  https://www.baidu.com/

➜  ~  ab -help

Usage: ab [options] [http[s]://]hostname[:port]/path

Options are:

    -n requests     Number of requests to perform

    -c concurrency  Number of multiple requests to make at a time

    -t timelimit    Seconds to max. to spend on benchmarking

                    This implies -n

    -s timeout      Seconds to max. wait for each response

                    Default is  seconds

    -b windowsize   Size of TCP send/receive buffer, in bytes

    -B address      Address to bind to when making outgoing connections

    -p postfile     File containing data to POST. Remember also to set -T

    -u putfile      File containing data to PUT. Remember also to set -T

    -T content-type Content-type header to use for POST/PUT data, eg.

                    'application/x-www-form-urlencoded'

                    Default is 'text/plain'

    -v verbosity    How much troubleshooting info to print

    -w              Print out results in HTML tables

    -i              Use HEAD instead of GET

    -x attributes   String to insert as table attributes

    -y attributes   String to insert as tr attributes

    -z attributes   String to insert as td or th attributes

    -C attribute    Add cookie, eg. 'Apache=1234'. (repeatable)

    -H attribute    Add Arbitrary header line, eg. 'Accept-Encoding: gzip'

                    Inserted after all normal header lines. (repeatable)

    -A attribute    Add Basic WWW Authentication, the attributes

                    are a colon separated username and password.

    -P attribute    Add Basic Proxy Authentication, the attributes

                    are a colon separated username and password.

    -X proxy:port   Proxyserver and port number to use

    -V              Print version number and exit

    -k              Use HTTP KeepAlive feature

    -d              Do not show percentiles served table.

    -S              Do not show confidence estimators and warnings.

    -q              Do not show progress when doing more than  requests

    -l              Accept variable document length (use this for dynamic pages)

    -g filename     Output collected data to gnuplot format file.

    -e filename     Output CSV file with percentages served

    -r              Don't exit on socket receive errors.

    -m method       Method name

    -h              Display usage information (this message)

    -I              Disable TLS Server Name Indication (SNI) extension

    -Z ciphersuite  Specify SSL/TLS cipher suite (See openssl ciphers)

    -f protocol     Specify SSL/TLS protocol

                    (TLS1, TLS1., TLS1. or ALL)