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tool: add "variable" support

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Add support for command line variables. Set variables with --variable
name=content or --variable name@file (where "file" can be stdin if set
to a single dash (-)).

Variable content is expanded in option parameters using "{{name}}"
(without the quotes) if the option name is prefixed with
"--expand-". This gets the contents of the variable "name" inserted, or
a blank if the name does not exist as a variable. Insert "{{" verbatim
in the string by prefixing it with a backslash, like "\\{{".

Import an environment variable with --variable %name. It makes curl exit
with an error if the environment variable is not set. It can also rather
get a default value if the variable does not exist, using =content or
@file like shown above.

Example: get the USER environment variable into the URL:

 --variable %USER
 --expand-url = "https://example.com/api/{{USER}}/method"

When expanding variables, curl supports a set of functions that can make
the variable contents more convenient to use. It can trim leading and
trailing white space with "trim", output the contents as a JSON quoted
string with "json", URL encode it with "url" and base 64 encode it with
"b64". To apply functions to a variable expansion, add them colon
separated to the right side of the variable. They are then performed in
a left to right order.

Example: get the contents of a file called $HOME/.secret into a variable
called "fix". Make sure that the content is trimmed and percent-encoded
sent as POST data:

  --variable %HOME=/home/default
  --expand-variable fix@{{HOME}}/.secret
  --expand-data "{{fix:trim:url}}"
  https://example.com/

Documented. Many new test cases.

Co-brainstormed-by: Emanuele Torre
Assisted-by: Jat Satiro
Closes #11346
This commit is contained in:
Daniel Stenberg 2023-07-31 11:50:28 +02:00
parent 47a3e6e577
commit 2e160c9c65
No known key found for this signature in database
GPG key ID: 5CC908FDB71E12C2
32 changed files with 1562 additions and 258 deletions
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49
src/tool_operate.c
View file

@ -2756,36 +2756,39 @@ CURLcode operate(struct GlobalConfig *global, int argc, argv_item_t argv[])
/* Cleanup the libcurl source output */
easysrc_cleanup();
}
return CURLE_OUT_OF_MEMORY;
result = CURLE_OUT_OF_MEMORY;
}
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_COOKIE);
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_DNS);
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_SSL_SESSION);
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_CONNECT);
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_PSL);
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_HSTS);
if(!result) {
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_COOKIE);
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_DNS);
curl_share_setopt(share, CURLSHOPT_SHARE,
CURL_LOCK_DATA_SSL_SESSION);
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_CONNECT);
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_PSL);
curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_HSTS);
/* Get the required arguments for each operation */
do {
result = get_args(operation, count++);
/* Get the required arguments for each operation */
do {
result = get_args(operation, count++);
operation = operation->next;
} while(!result && operation);
operation = operation->next;
} while(!result && operation);
/* Set the current operation pointer */
global->current = global->first;
/* Set the current operation pointer */
global->current = global->first;
/* now run! */
result = run_all_transfers(global, share, result);
/* now run! */
result = run_all_transfers(global, share, result);
curl_share_cleanup(share);
if(global->libcurl) {
/* Cleanup the libcurl source output */
easysrc_cleanup();
curl_share_cleanup(share);
if(global->libcurl) {
/* Cleanup the libcurl source output */
easysrc_cleanup();
/* Dump the libcurl code if previously enabled */
dumpeasysrc(global);
/* Dump the libcurl code if previously enabled */
dumpeasysrc(global);
}
}
}
else
@ -2793,5 +2796,7 @@ CURLcode operate(struct GlobalConfig *global, int argc, argv_item_t argv[])
}
}
varcleanup(global);
return result;
}