I want to test the web app, but I don't know how to post characters like "\xff" as parameters.
Is there any way like this?
curl
How about specifying a file containing a parameter string containing an incorrect byte as data?
$echo-e'str=\xff'>invalid_bytes.txt
$ hexdump-Cinvalid_bytes.txt
000000007374 723d ff0a | str=..|
00000006
$ curl-d@invalid_bytes.txt http://httpbin.org/post
{
"args": {},
"data":",
"files": {},
"form": {
"str": "\ufffd"
},
"headers": {
"Accept": "*/*",
"Connection": "close",
"Content-Length": "6",
"Content-Type": "application/x-www-form-urlencoded",
"Host": "httpbin.org",
"User-Agent": "curl/7.52.1"
},
"json"—null,
"origin": "xxx.xxx.xxx.xxx",
"url": "http://httpbin.org/post"
}
You can also pipe the results of echo.
$echo-e'str=\xff' | curl-d@-http://httpbin.org/post
It's almost the same, but you can also use command replacement.
$curl-d "$(echo-e'str=\xff')"http://httpbin.org/post
Instead of saving it to a file, you can also save it to a variable in the shell.
$DATA=$(echo-e'\xff') curl-d "str=${DATA}" http://httpbin.org/post
ヌル Please note that if you try to send null characters (\x00), they will be treated as string termination in some ways and you will not be able to send them well.(You can tell the difference by running the string as abc\x00abc and so on.)
-d/--dataOption Descriptionsman curl
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