[英]Passing json as command line argument in Unix
I am trying to pass a json string as command line argument to my c++ application in a Unix environment.我正在尝试在 Unix 环境中将 json 字符串作为命令行参数传递给我的 c++ 应用程序。
.\SampleApp -j {\"speed\":\"15\",\"rpm\":\"100\",\"loc\":[\"-83.11\",\"42.11\"]}
I'm using getopt() function in my sample app to parse the arguments.我在我的示例应用程序中使用 getopt() function 来解析 arguments。 At the output I am receiving only speed:15.
在 output 我只收到速度:15。 But when I run the application as
但是当我运行应用程序时
.\SampleApp -j \"speed\":\"15\",\"rpm\":\"100\",\"loc\":[\"-83.11\",\"42.11\"]
it works.有用。 My question is how do I pass the json string with curly braces properly to the application.
我的问题是如何将带有花括号的 json 字符串正确传递给应用程序。 I tried using escape sequence,
\{
, but it did not work.我尝试使用转义序列
\{
,但它不起作用。
Usually, it easier to use single quote when the text has double quotes通常,当文本有双引号时,使用单引号会更容易
./SampleApp -j '{"speed":"15","rpm":"100","loc":["-83.11","42.11"]}'
Or over multiple lines for readability:或多行以提高可读性:
./SampleApp -j '
{
"speed":"15",
"rpm":"100",
"loc":["-83.11","42.11"]
}'
You can do this by just passing the argument inside " . Also, it's ./ , not .\ .您可以通过在"中传递参数来做到这一点。此外,它是./ ,而不是.\ 。
./SampleApp -j "{\"speed\":\"15\",\"rpm\":\"100\",\"loc\":[\"-83.11\",\"42.11\"]}"
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