(Objective-C) Get GMail Message format=full

Examines the JSON returned when getting a message using format=full.

For more information, see https://developers.google.com/gmail/api/v1/reference/users/messages/get

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoHttp.h>
#import <NSString.h>
#import <CkoHttpResponse.h>
#import <CkoJsonObject.h>

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

CkoHttp *http = [[CkoHttp alloc] init];

http.AuthToken = @"ACCESS_TOKEN";

http.Accept = @"application/json";

// This is the ID for a particular message in our mailbox...
NSString *id = @"1712bc1dc22da2a2";

// Download the message using format=full
[http SetUrlVar: @"id" value: id];

CkoHttpResponse *resp = [http QuickRequest: @"GET" url: @"https://www.googleapis.com/gmail/v1/users/userId/messages/{$id}?format=full"];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

NSLog(@"%@%d",@"Response Status Code: ",[resp.StatusCode intValue]);

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json Load: resp.BodyStr];
json.EmitCompact = NO;
NSLog(@"%@",[json Emit]);

if ([resp.StatusCode intValue] != 200) {
    NSLog(@"%@",@"Failed.");

    return;
}

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// Here is a sample "format=full" response that contains 4 attachments:
// The JSON parsing source code is shown below...

// {
//   "id": "1712bc1dc22da2a2",
//   "threadId": "1712bc1dc22da2a2",
//   "labelIds": [
//     "UNREAD",
//     "IMPORTANT",
//     "CATEGORY_PERSONAL",
//     "INBOX"
//   ],
//   "snippet": "Hello, this is a test email with attachments..",
//   "historyId": "759379",
//   "internalDate": "1585577056000",
//   "payload": {
//     "partId": "",
//     "mimeType": "multipart/mixed",
//     "filename": "",
//     "headers": [
//       {
//         "name": "Delivered-To",
//         "value": "chilkat.support@gmail.com"
//       },
//       {
//         "name": "Received",
//         "value": "..."
//       },
//       {
//         "name": "X-Received",
//         "value": "..."
//       },
//       {
//         "name": "X-Google-Smtp-Source",
//         "value": "..."
//       },
//       {
//         "name": "X-Received",
//         "value": "..."
//       },
//       {
//         "name": "ARC-Seal",
//         "value": "..."
//       },
//       {
//         "name": "ARC-Message-Signature",
//         "value": "..."
//       },
//       {
//         "name": "ARC-Authentication-Results",
//         "value": "..."
//       },
//       {
//         "name": "Return-Path",
//         "value": "..."
//       },
//       {
//         "name": "Received",
//         "value": "..."
//       },
//       {
//         "name": "Received-SPF",
//         "value": "..."
//       },
//       {
//         "name": "Authentication-Results",
//         "value": "..."
//       },
//       {
//         "name": "DKIM-Signature",
//         "value": "..."
//       },
//       {
//         "name": "DKIM-Signature",
//         "value": "..."
//       },
//       {
//         "name": "Subject",
//         "value": "Test email with attachments"
//       },
//       {
//         "name": "From",
//         "value": "..."
//       },
//       {
//         "name": "To",
//         "value": "..."
//       },
//       {
//         "name": "Date",
//         "value": "Mon, 30 Mar 2020 14:04:16 +0000"
//       },
//       {
//         "name": "Mime-Version",
//         "value": "1.0"
//       },
//       {
//         "name": "Content-Type",
//         "value": "multipart/mixed;  boundary=\"=_wNvwW3YTnQBZ24pmfFNfay3S6M-pHT7KdZIkXwYF-BFiPYNE\""
//       },
//       {
//         "name": "References",
//         "value": "..."
//       },
//       {
//         "name": "X-Mailer",
//         "value": "..."
//       },
//       {
//         "name": "Thread-Index",
//         "value": "AQHWBpwYB0UZvgGPT1KluJJUCF0BGg=="
//       },
//       {
//         "name": "Thread-Topic",
//         "value": "Test email with attachments"
//       },
//       {
//         "name": "Message-ID",
//         "value": "..."
//       },
//       {
//         "name": "X-SES-Outgoing",
//         "value": "2020.03.30-54.240.27.106"
//       },
//       {
//         "name": "Feedback-ID",
//         "value": "..."
//       }
//     ],
//     "body": {
//       "size": 0
//     },
//     "parts": [
//       {
//         "partId": "0",
//         "mimeType": "multipart/alternative",
//         "filename": "",
//         "headers": [
//           {
//             "name": "Content-Type",
//             "value": "multipart/alternative;  boundary=\"=_wNvwHW2hdOZkYPaJAhdOY4+XBEFNAcvIZ1sQcW4JkBcAdDqA\""
//           }
//         ],
//         "body": {
//           "size": 0
//         },
//         "parts": [
//           {
//             "partId": "0.0",
//             "mimeType": "text/plain",
//             "filename": "",
//             "headers": [
//               {
//                 "name": "Content-Type",
//                 "value": "text/plain; charset=UTF-8"
//               },
//               {
//                 "name": "Content-Transfer-Encoding",
//                 "value": "7bit"
//               }
//             ],
//             "body": {
//               "size": 129,
//               "data": "SGVsbG8sIHRoaXMgaXMgYSB0ZXN0IGVtYWlsIHdpdGggYXR0YWNobWVudHMuLg0KIA0KIA0KIA0KLS0gDQogQmVzdCBSZWdhcmRzLA0KIE1hdHQgRmF1c2V5DQogQ2hpbGthdCBTb2Z0d2FyZSwgSW5jLiANCg0KIA0KDQogDQog"
//             }
//           },
//           {
//             "partId": "0.1",
//             "mimeType": "multipart/related",
//             "filename": "",
//             "headers": [
//               {
//                 "name": "Content-Type",
//                 "value": "multipart/related;  boundary=\"=_wNvw-LQZP2xD5vBm4q4esgoD5F4j3w+DRPUkkzOidpnpXAre\""
//               }
//             ],
//             "body": {
//               "size": 0
//             },
//             "parts": [
//               {
//                 "partId": "0.1.0",
//                 "mimeType": "text/html",
//                 "filename": "",
//                 "headers": [
//                   {
//                     "name": "Content-Type",
//                     "value": "text/html; charset=utf-8"
//                   },
//                   {
//                     "name": "Content-Transfer-Encoding",
//                     "value": "7bit"
//                   }
//                 ],
//                 "body": {
//                   "size": 530,
//                   "data": "PGh0bWw-DQogIDxoZWFkPg0KDQogICAgPG1ldGEgaHR0cC1lcXVpdj0iY29udGVudC10eXBlIiBjb250ZW50PSJ0ZXh0L2h0bWw7IGNoYXJzZXQ9VVRGLTgiPg0KICA8L2hlYWQ-DQogIDxib2R5Pg0KICAgIEhlbGxvLCB0aGlzIGlzIGE8Zm9udCBjb2xvcj0iI2ZmMDAwMCI-IHRlc3Q8L2ZvbnQ-IGVtYWlsIHdpdGgNCiAgICBhdHRhY2htZW50cy4uPGJyPg0KICAgIDxicj4NCiAgICA8aW1nIG1vei1kby1ub3Qtc2VuZD0iZmFsc2UiDQogICAgICBzcmM9ImNpZDpwYXJ0MS5GMEI1MzVEQi5DQjZFN0ExMkBjaGlsa2F0c29mdC5jb20iIGFsdD0ic2VhaG9yc2UiDQogICAgICB3aWR0aD0iMTIwIiBoZWlnaHQ9IjEyMCI-PGJyPg0KICAgIDxkaXYgY2xhc3M9Im1vei1zaWduYXR1cmUiPi0tIDxicj4NCiAgICAgIEJlc3QgUmVnYXJkcyw8YnI-DQogICAgICBNYXR0IEZhdXNleTxicj4NCiAgICAgIENoaWxrYXQgU29mdHdhcmUsIEluYy4NCiAgICAgIDxwPg0KICAgICAgPC9wPg0KICAgIDwvZGl2Pg0KICA8L2JvZHk-DQo8L2h0bWw-DQo="
//                 }
//               },
//               {
//                 "partId": "0.1.1",
//                 "mimeType": "image/jpeg",
//                 "filename": "seahorse.jpg",
//                 "headers": [
//                   {
//                     "name": "Content-Type",
//                     "value": "image/jpeg"
//                   },
//                   {
//                     "name": "Content-Id",
//                     "value": "\u003cpart1.F0B535DB.CB6E7A12@chilkatsoft.com\u003e"
//                   },
//                   {
//                     "name": "Content-Disposition",
//                     "value": "inline; filename=seahorse.jpg"
//                   },
//                   {
//                     "name": "Content-Transfer-Encoding",
//                     "value": "base64"
//                   }
//                 ],
//                 "body": {
//                   "attachmentId": "ANGjdJ-Z1c9gUGsEzexYYEsF5nLHGUaNiZQs5HkuFQVPo5jq1eze8poigmarvERUIRj1coKUaftiQPWhiZWaFyLDcyjFbfLdjWyyO3AxRO8pY5liAhVp1bt_5f79Nk0vfnZXL0OnZmNAMdrcFe645DbsajwDZcoYnWVcsV9Fe6PCNq41e6XW8Ko4Ex7zMzkATiwlLyx0RLcR0hl-FuZ-UVpQI0JeMTkNi4eN5-9L4dRU7HTo9qEyFW_p3__vXrnEJvmEvWXNUqxKLktcZvkvql6mnAVMDiIapqsE6x0EAvFobre7sf1_T6ieVlA-m92vrtELC2HHdxzkU-qhC_LuoOSOz8nd8tfWsrB8zex0v6NFFP9mJmBUb1QGtCGTxLdI40z_LdMOSiaqmeCq4o_s",
//                   "size": 24388
//                 }
//               }
//             ]
//           }
//         ]
//       },
//       {
//         "partId": "1",
//         "mimeType": "application/pdf",
//         "filename": "helloWorld.pdf",
//         "headers": [
//           {
//             "name": "Content-Type",
//             "value": "application/pdf; name=helloWorld.pdf"
//           },
//           {
//             "name": "Content-Transfer-Encoding",
//             "value": "base64"
//           },
//           {
//             "name": "Content-Disposition",
//             "value": "attachment; filename=helloWorld.pdf"
//           }
//         ],
//         "body": {
//           "attachmentId": "ANGjdJ-oy3aCuZISJKLAhUdaEksCEklbAPyMaWzFgqOMGbPCRkgwgeu_Kttd99C17OBTHROkDZGekibTKWXGfscB5ww7fw4E65_V1dQ-jHhb2TD1Cdm58-BbNw2iDxzptco8iILPiSnLLfFn5Ps7nsRcxHaGTt3r0yqFKCuIYNnPK1vM04BXI_cfzo-HnI4I3tD6oHNHOGVQrL01MdShFQjPELPUjXM8z1qs7Kom-QyvV1iOldUN-66UuhynsmDX-CMM5TIdB-8KD_lmdhf-0DqG8JnCA20XpXyfqwS8XFkPA-t-QSjb7SdkHQFtQ4lz2PcBREFzZ2eI5j0l0Y_dQHRPYTeMwkVl1yl4MfFT4C4iso3VSF-eqaIjiFCbXKCFNyeEIW5WFsv189dhlSqU",
//           "size": 934
//         }
//       },
//       {
//         "partId": "2",
//         "mimeType": "application/x-gzip",
//         "filename": "hamlet.xml.gz",
//         "headers": [
//           {
//             "name": "Content-Type",
//             "value": "application/x-gzip; name=hamlet.xml.gz"
//           },
//           {
//             "name": "Content-Transfer-Encoding",
//             "value": "base64"
//           },
//           {
//             "name": "Content-Disposition",
//             "value": "attachment; filename=hamlet.xml.gz"
//           }
//         ],
//         "body": {
//           "attachmentId": "ANGjdJ9rvj1ebIc-f0cXG0kwsb6pDBkRCNk3IQXbJ5z0-s2mEcVat3Pp6pVm3rTkRLOyeXHzRcTuel7nxRFJX6WVAKtG-5B-GL_b6DlsOWOzH4A_IKlyJ9U4aeWT02CgQL8oRwlCu1h0BtnY6lT8zureboGOqR7qoa-i5jH8xr6ds0nUDZp71lAwfOjji3eG6Wg6HfzWzWUThYPH3ba0_q35Jii8JIMhyJwwZnGjN3lvW_VhN6UIL1DIpop95b8rdwJdpyUavm7VhGtdNrI-mpgWQtT7WIAdIe6a-O74Zf4AB7uG7bp9R-IMBqQT-1jQqkN2_xlSpe3meWbuNu-4zsYfXN-IqM-Iy4dudAXjt0aY3Y8zxuHfW5qT7o4u8wSszhTIjM1j8lt-N7GZqnwJ",
//           "size": 77409
//         }
//       },
//       {
//         "partId": "3",
//         "mimeType": "text/plain",
//         "filename": "brasil_cert.pem",
//         "headers": [
//           {
//             "name": "Content-Type",
//             "value": "text/plain; name=brasil_cert.pem"
//           },
//           {
//             "name": "Content-Transfer-Encoding",
//             "value": "base64"
//           },
//           {
//             "name": "Content-Disposition",
//             "value": "attachment; filename=brasil_cert.pem"
//           }
//         ],
//         "body": {
//           "attachmentId": "ANGjdJ8nGD_xRHvjDwNIaSUleWCWk15ksUleks0fJ29gfGVOebzjBOUnAHYgKPefUQ6d6ExtqYubpvGCka1kJAB4gFwsnhQeflBhFNkORBqtb6FAGq0FcNgrbuxyKywmoHOUV4GDsNs4OGroEcFhBeZNQ8XKEdEoaO8ht8DARn2LncjxioQ4TmZ6jawmMF-mLbW1mz4QjwNir5jLOsE11tYZV2tLDoqjsubKeJJA8xojWo9r50zWfJFgWJKXZJwyNvKyZTwLmmBL_ATFxLFp4Nvo4K37uuVdUCG8WXiWwNr0oIV1RZOd_ZOA7M6Jif0wUcppJdxXRqlsFJqGlcVsLowkVGrJNAMe-fLY1x4w5od3axZIdZQgBPlVRKYYu5xopPTrLJsn4ld7pNyAhpZW",
//           "size": 2952
//         }
//       },
//       {
//         "partId": "4",
//         "mimeType": "application/x-zip-compressed",
//         "filename": "helloWorld.zip",
//         "headers": [
//           {
//             "name": "Content-Type",
//             "value": "application/x-zip-compressed; name=helloWorld.zip"
//           },
//           {
//             "name": "Content-Transfer-Encoding",
//             "value": "base64"
//           },
//           {
//             "name": "Content-Disposition",
//             "value": "attachment; filename=helloWorld.zip"
//           }
//         ],
//         "body": {
//           "attachmentId": "ANGjdJ9nWglkRNneBVGFk5GwSg83COa0zBeiTAvoMYniPklY03-w93dmEVHJTB9CAu5WMFW_yhV4ou2oX2w9SlpZjjyTgSc7sfYWeuX3pt29z67agy9WUVYeNGpo_30LSPgeyNk_Nm0DTAaektJTEMSy65rjRyK03VkHahNpMLY6Kd_pdfrk50oceuXzwNJZ-V-bftmIluueoQMqLcWQSGBRvEdIcl6EcPFFw8KuMLrjZZJwq8_bb8uM6zUvV23Q9LsLTgWg8FaBWejBf0wuIFXl3ZhtSLa-Y8OXCApHPdUnn45hccAzaQEmy4ZG7cgvCdN_jA9eFX46HYHty7ewleKPFGLTVof2JWsMiIi9BPqfohqQ5FPm1WXlGG_bOHvaMdoWcoqbKMMvF8lWZsfz",
//           "size": 174
//         }
//       }
//     ]
//   },
//   "sizeEstimate": 152847
// }

NSString *strVal = 0;
NSString *name = 0;
NSString *value = 0;
NSString *partId = 0;
NSString *mimeType = 0;
NSString *filename = 0;
int bodySize;
NSString *bodyAttachmentId = 0;
int j;
int count_j;
NSString *bodyData = 0;
int k;
int count_k;
CkoJsonObject *json1 = 0;
int i1;
int count_i1;

NSString *id = [json StringOf: @"id"];
NSString *threadId = [json StringOf: @"threadId"];
NSString *snippet = [json StringOf: @"snippet"];
NSString *historyId = [json StringOf: @"historyId"];
NSString *internalDate = [json StringOf: @"internalDate"];
NSString *payloadPartId = [json StringOf: @"payload.partId"];
NSString *payloadMimeType = [json StringOf: @"payload.mimeType"];
NSString *payloadFilename = [json StringOf: @"payload.filename"];
int payloadBodySize = [[json IntOf: @"payload.body.size"] intValue];
int sizeEstimate = [[json IntOf: @"sizeEstimate"] intValue];
int i = 0;
int count_i = [[json SizeOfArray: @"labelIds"] intValue];
while (i < count_i) {
    json.I = [NSNumber numberWithInt: i];
    strVal = [json StringOf: @"labelIds[i]"];
    i = i + 1;
}

i = 0;
count_i = [[json SizeOfArray: @"payload.headers"] intValue];
while (i < count_i) {
    json.I = [NSNumber numberWithInt: i];
    name = [json StringOf: @"payload.headers[i].name"];
    value = [json StringOf: @"payload.headers[i].value"];
    i = i + 1;
}

i = 0;
count_i = [[json SizeOfArray: @"payload.parts"] intValue];
while (i < count_i) {
    json.I = [NSNumber numberWithInt: i];
    partId = [json StringOf: @"payload.parts[i].partId"];
    mimeType = [json StringOf: @"payload.parts[i].mimeType"];
    filename = [json StringOf: @"payload.parts[i].filename"];
    bodySize = [[json IntOf: @"payload.parts[i].body.size"] intValue];
    bodyAttachmentId = [json StringOf: @"payload.parts[i].body.attachmentId"];
    j = 0;
    count_j = [[json SizeOfArray: @"payload.parts[i].headers"] intValue];
    while (j < count_j) {
        json.J = [NSNumber numberWithInt: j];
        name = [json StringOf: @"payload.parts[i].headers[j].name"];
        value = [json StringOf: @"payload.parts[i].headers[j].value"];
        j = j + 1;
    }

    j = 0;
    count_j = [[json SizeOfArray: @"payload.parts[i].parts"] intValue];
    while (j < count_j) {
        json.J = [NSNumber numberWithInt: j];
        partId = [json StringOf: @"payload.parts[i].parts[j].partId"];
        mimeType = [json StringOf: @"payload.parts[i].parts[j].mimeType"];
        filename = [json StringOf: @"payload.parts[i].parts[j].filename"];
        bodySize = [[json IntOf: @"payload.parts[i].parts[j].body.size"] intValue];
        bodyData = [json StringOf: @"payload.parts[i].parts[j].body.data"];
        k = 0;
        count_k = [[json SizeOfArray: @"payload.parts[i].parts[j].headers"] intValue];
        while (k < count_k) {
            json.K = [NSNumber numberWithInt: k];
            name = [json StringOf: @"payload.parts[i].parts[j].headers[k].name"];
            value = [json StringOf: @"payload.parts[i].parts[j].headers[k].value"];
            k = k + 1;
        }

        k = 0;
        count_k = [[json SizeOfArray: @"payload.parts[i].parts[j].parts"] intValue];
        while (k < count_k) {
            json.K = [NSNumber numberWithInt: k];
            partId = [json StringOf: @"payload.parts[i].parts[j].parts[k].partId"];
            mimeType = [json StringOf: @"payload.parts[i].parts[j].parts[k].mimeType"];
            filename = [json StringOf: @"payload.parts[i].parts[j].parts[k].filename"];
            bodySize = [[json IntOf: @"payload.parts[i].parts[j].parts[k].body.size"] intValue];
            bodyData = [json StringOf: @"payload.parts[i].parts[j].parts[k].body.data"];
            bodyAttachmentId = [json StringOf: @"payload.parts[i].parts[j].parts[k].body.attachmentId"];

            json1 = [json ObjectOf: @"payload.parts[i].parts[j].parts[k]"];
            i1 = 0;
            count_i1 = [[json1 SizeOfArray: @"headers"] intValue];
            while (i1 < count_i1) {
                json1.I = [NSNumber numberWithInt: i1];
                name = [json1 StringOf: @"headers[i].name"];
                value = [json1 StringOf: @"headers[i].value"];
                i1 = i1 + 1;
            }

            k = k + 1;
        }

        j = j + 1;
    }

    i = i + 1;
}