Zig

Get Individual Photo Info

See more Facebook Examples

Assuming we have the ID of a Photo, this example demonstrates how to retrieve the photo information and parse the JSON. 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.

    // This example assumes a previously obtained an access token
    const oauth2 = try chilkat.OAuth2.init();
    defer oauth2.deinit();
    oauth2.setAccessToken("FACEBOOK-ACCESS-TOKEN");

    const rest = try chilkat.Rest.init();
    defer rest.deinit();

    // Connect to Facebook...
    rest.connect("graph.facebook.com", 443, true, true) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    // Provide the authentication credentials (i.e. the access key)
    rest.setAuthOAuth2(oauth2) catch {};

    // Assumes we've already obtained a Photo ID.
    const photo_id = "10210199026347451";

    const sb_path = try chilkat.StringBuilder.init();
    defer sb_path.deinit();
    sb_path.append("/v2.7/") catch {};
    sb_path.append(photo_id) catch {};

    // Select the fields we want.
    // This example will select many of the possible fields.
    // See https://developers.facebook.com/docs/graph-api/reference/photo/
    rest.addQueryParam("fields", "id,album,can_delete,can_tag,from,height,width,images,link,name,name_tags,picture,place,target") catch {};

    const response_json = rest.fullRequestNoBody(alloc, "GET", try sb_path.getAsString(alloc)) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.setEmitCompact(false);
    json.load(response_json) catch {};

    // Show the JSON in human-readable format.
    std.debug.print("{s}\n", .{try json.emit(alloc)});

    // A sample response is shown below.
    // Demonstrate how to parse values from the JSON.
    std.debug.print("Album name: {s}\n", .{try json.stringOf(alloc, "album.name")});
    const can_delete = json.boolOf("can_delete");
    std.debug.print("Can Delete: {}\n", .{can_delete});
    std.debug.print("From Name: {s}\n", .{try json.stringOf(alloc, "from.name")});
    const height = json.intOf("height");
    const width = json.intOf("width");
    std.debug.print("Dimensions: {d}x{d}\n", .{ width, height });
    std.debug.print("First Image Source: {s}\n", .{try json.stringOf(alloc, "images[0].source")});

    // A sample JSON response is shown here.
    // {
    //   "id": "10210199026347451",
    //   "album": {
    //     "created_time": "2009-10-19T00:06:46+0000",
    //     "name": "Timeline Photos",
    //     "id": "1237223526054"
    //   },
    //   "can_delete": true,
    //   "can_tag": true,
    //   "from": {
    //     "name": "Matt Smith",
    //     "id": "10224048320139890"
    //   },
    //   "height": 120,
    //   "width": 120,
    //   "images": [
    //     {
    //       "height": 120,
    //       "source": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026347451_7830642117574407060_n.jpg?oh=a7f9ed10cf9cd81a82adeb541c60e2e2&oe=58ABB195",
    //       "width": 120
    //     }
    //   ],
    //   "link": "https:\/\/www.facebook.com\/photo.php?fbid=10210199026347451&set=a.1237223526054.2038240.1093202869&type=3",
    //   "name": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
    //   "picture": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026347451_7830642117574407060_n.jpg?oh=a7f9ed10cf9cd81a82adeb541c60e2e2&oe=58ABB195"
    // }
    //
}