Zig Requires Chilkat v11.5.0+

curl POST with JSON Input and JSON Output

See more CURL Examples

Demonstrates running a simple curl command with JSON input and JSON output. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // Run the following curl command

    //  curl -X POST https://httpbin.org/post \
    //       -H "Content-Type: application/json" \
    //       -d '{
    //             "title": "foo",
    //             "body": "bar",
    //             "userId": 1
    //           }'

    // The backslashes at the end of lines are not required.  Chilkat ignores them if present.
    const sb_target_curl = try chilkat.StringBuilder.init();
    defer sb_target_curl.deinit();
    sb_target_curl.appendLn(" curl -X POST https://httpbin.org/post \\") catch {};
    sb_target_curl.appendLn("      -H \"Content-Type: application/json\" \\") catch {};
    sb_target_curl.appendLn("      -d '{") catch {};
    sb_target_curl.appendLn("            \"title\": \"foo\",") catch {};
    sb_target_curl.appendLn("            \"body\": \"bar\",") catch {};
    sb_target_curl.appendLn("            \"userId\": 1") catch {};
    sb_target_curl.appendLn("          }'") catch {};

    const http_curl = try chilkat.HttpCurl.init();
    defer http_curl.deinit();

    // Run the curl command.
    http_curl.doYourThing(try sb_target_curl.getAsString(alloc)) catch {
        std.debug.print("{s}\n", .{try http_curl.getLastErrorText(alloc)});
        return;
    };

    const response_json = try chilkat.JsonObject.init();
    defer response_json.deinit();
    response_json.setEmitCompact(false);

    http_curl.getResponseJson(response_json) catch {};

    var status_code: i32 = http_curl.getStatusCode();
    std.debug.print("response status code: {d}\n", .{status_code});

    std.debug.print("{s}\n", .{try response_json.emit(alloc)});

    // Output:

    // response status code: 200
    // {
    //   "args": {},
    //   "data": "{\r\n            \"title\": \"foo\",\r\n            \"body\": \"bar\",\r\n            \"userId\": 1\r\n          }",
    //   "files": {},
    //   "form": {},
    //   "headers": {
    //     "Content-Length": "96",
    //     "Content-Type": "application/json",
    //     "Host": "httpbin.org",
    //     "X-Amzn-Trace-Id": "Root=1-69e8db8b-459b3bdf7b7a3bc749184968"
    //   },
    //   "json": {
    //     "body": "bar",
    //     "title": "foo",
    //     "userId": 1
    //   },
    //   "origin": "123.222.222.222",
    //   "url": "https://httpbin.org/post"
    // }

    // ----------------------------------------------------------------------------------
    // Another example:

    // curl -X POST https://postman-echo.com/post \
    //      -H "Content-Type: application/json" \
    //      -d '{"foo":"bar"}'

    const target_curl = "curl -X POST https://postman-echo.com/post -H \"Content-Type: application/json\" -d '{\"foo\":\"bar\"}'";

    // Run the curl command.
    http_curl.doYourThing(target_curl) catch {
        std.debug.print("{s}\n", .{try http_curl.getLastErrorText(alloc)});
        return;
    };

    http_curl.getResponseJson(response_json) catch {};

    status_code = http_curl.getStatusCode();
    std.debug.print("response status code: {d}\n", .{status_code});

    std.debug.print("{s}\n", .{try response_json.emit(alloc)});

    // Output:

    // response status code: 200
    // {
    //   "args": {},
    //   "data": {
    //     "foo": "bar"
    //   },
    //   "files": {},
    //   "form": {},
    //   "headers": {
    //     "host": "postman-echo.com",
    //     "content-length": "13",
    //     "content-type": "application/json",
    //     "x-forwarded-proto": "https",
    //     "accept-encoding": "gzip, br"
    //   },
    //   "json": {
    //     "foo": "bar"
    //   },
    //   "url": "https://postman-echo.com/post"
    // }
}