Zig

HTTP multipart/form-data Upload

See more HTTP Examples

Demonstrates how to upload files to an HTTP server using a multipart/form-data POST. Zig

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

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

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    const http = try chilkat.Http.init();
    defer http.deinit();

    const req = try chilkat.HttpRequest.init();
    defer req.deinit();
    req.setHttpVerb("POST");
    req.setContentType("multipart/form-data");
    req.setPath("rcvFormDataUpload.aspx");

    // Send an "Expect: 100-continue" header in the request.
    // This causes the HTTP server to end a 100-continue response
    // immediately after receiving the HTTP header.  The client
    // (Chilkat) will receive this intermediate response, and if
    // it's not an error response, it knows that the HTTP server will
    // accept the data that is forthcoming.
    // The alternative is to get an error response after trying to upload
    // the entire contents of the files.
    req.addHeader("Expect", "100-continue");

    // Call AddFileForUpload2 for each file to be uploaded in the HTTP multipart/form-data POST
    // To allow Chilkat to determine the content-type automatically based on file-extension,
    // call AddFileForUpload instead.

    // The 1st arg is the filename passed in the HTTP request.
    // The 2nd arg is the path in the local filesytem.
    // The file is not loaded into memory.  It is streamed directly from the file
    // when the HTTP POST is sent.
    req.addFileForUpload2("starfish.jpg", "c:/qa_data/starfish.jpg", "image/jpg") catch {
        std.debug.print("{s}\n", .{try req.getLastErrorText(alloc)});
        return;
    };

    req.addFileForUpload("something.pdf", "c:/qa_data/something.pdf") catch {
        std.debug.print("{s}\n", .{try req.getLastErrorText(alloc)});
        return;
    };

    // Its also possible to add a file from a string:
    try req.addStringForUpload("test.xml", "test.xml", "<abc>This is the test.xml content</abc>", "utf-8");
    // We'll assume success since no files are involved..

    // This sends the HTTP request (with 3 files being uploaded) to
    // http://www.mywebserver123abc.com/rcvFormDataUpload.aspx
    const resp = try chilkat.HttpResponse.init();
    defer resp.deinit();
    http.httpSReq("www.mywebserver123abc.com", 80, false, req, resp) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("HTTP response status: {d}\n", .{resp.getStatusCode()});
    // See the online reference documentation for
    // other information that can be obtained from the response object.

    // To send using SSL/TLS, do this instead.
    // This sends to https://www.mywebserver123abc.com/rcvFormDataUpload.aspx
    http.httpSReq("www.mywebserver123abc.com", 443, true, req, resp) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("HTTP response status: {d}\n", .{resp.getStatusCode()});
    // See the online reference documentation for
    // other information that can be obtained from the response object.
}