如果我运行以下命令，一切正常：
curl -s -o /dev/null -w %{http_code} \
http://www.example.com/mywebservice/generic.example.com \
--header "Content-type: application/json" --request PUT \
--data '{"hostname":"generic.example.com", "project":"none", "usage":"generic", "environment":"production"}'
当我将此命令放入 /bin/sh脚本中的变量中并执行它时，我在服务器日志中显示了“HTTP 415不支持的媒体类型”：
#!/bin/sh
read -d '' CMD << EOF
curl -s -o /dev/null -w %{http_code} http://www.example.com/mywebservice/generic.example.com \
--header "Content-type: application/json" --request PUT \
--data '{"hostname":"generic.example.com", "project":"none", "usage":"generic", "environment":"production"}'
EOF
`$CMD`
我通过打印验证了该命令，它看起来像我运行的手动命令：
#!/bin/sh
read -d '' CMD << EOF
curl -s -o /dev/null -w %{http_code} http://www.example.com/mywebservice/generic.example.com \
--header "Content-type: application/json" --request PUT \
--data '{"hostname":"generic.example.com", "project":"none", "usage":"generic", "environment":"production"}'
EOF
echo $CMD
输出:
curl-s-o/dev/null-w % { http _ code } http://www.example.com/mywebservice/generic.example.com-header " Content-type:application/JSON "-请求PUT-data ' { " hostname ":" generic . example . com "，" project":"none "，" usage":"generic "，" environment":"production"} '
对我来说，它是这样工作的：
#!/bin/sh
read -d '' CMD << EOF
`/usr/bin/curl -s http://localhost:8080/someurl \
--header "Content-type: application/json"`
EOF
echo $CMD
如果在EOF内部进行评估呢？
