Objective-C GMail: Get a specific message (format="full")

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Gets a specific message using format=full.

Documentation: https://developers.google.com/gmail/api/v1/reference/users/messages/get


#import <CkoRest.h>
#import <CkoOAuth2.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>
#import <NSString.h>

CkoRest *rest = [[CkoRest alloc] init];
BOOL success;

//   Provide a previously obtained OAuth2 access token.
CkoOAuth2 *oauth2 = [[CkoOAuth2 alloc] init];
oauth2.AccessToken = @"OAUTH2_ACCESS_TOKEN";
[rest SetAuthOAuth2: oauth2];

success = [rest Connect: @"www.googleapis.com" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: YES];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

[rest AddPathParam: @"messageId" value: @"15fc23688c553739"];

[rest AddQueryParam: @"format" value: @"full"];

CkoStringBuilder *sbJson = [[CkoStringBuilder alloc] init];
success = [rest FullRequestNoBodySb: @"GET" uriPath: @"/gmail/v1/users/me/messages/messageId" sb: sbJson];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

if ([rest.ResponseStatusCode intValue] != 200) {
    NSLog(@"%@%d",@"Received error response code: ",[rest.ResponseStatusCode intValue]);
    NSLog(@"%@",@"Response body:");
    NSLog(@"%@",[sbJson GetAsString]);
    return;
}

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json LoadSb: sbJson];

//  The following code parses the JSON response.
//  A sample JSON response is shown below the sample code.
NSString *id = 0;
NSString *threadId = 0;
NSString *snippet = 0;
NSString *historyId = 0;
NSString *internalDate = 0;
NSString *payloadPartId = 0;
NSString *payloadMimeType = 0;
NSString *payloadFilename = 0;
int payloadBodySize;
int sizeEstimate;
int i;
int count_i;
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;
int k;
int count_k;
NSString *bodyData = 0;
int i1;
int count_i1;
CkoJsonObject *json1 = 0;

id = [json StringOf: @"id"];
threadId = [json StringOf: @"threadId"];
snippet = [json StringOf: @"snippet"];
historyId = [json StringOf: @"historyId"];
internalDate = [json StringOf: @"internalDate"];
payloadPartId = [json StringOf: @"payload.partId"];
payloadMimeType = [json StringOf: @"payload.mimeType"];
payloadFilename = [json StringOf: @"payload.filename"];
payloadBodySize = [[json IntOf: @"payload.body.size"] intValue];
sizeEstimate = [[json IntOf: @"sizeEstimate"] intValue];
i = 0;
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];
        bodyAttachmentId = [json StringOf: @"payload.parts[i].parts[j].body.attachmentId"];
        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"];

            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;
}

NSLog(@"%@",@"Example Completed.");

Sample JSON Response Body

{
  "id": "15fc23688c553739",
  "threadId": "15fc23688c553739",
  "labelIds": [
    "IMPORTANT",
    "SENT",
    "INBOX"
  ],
  "snippet": "This is a test. \u200b",
  "historyId": "1438",
  "internalDate": "1510791874000",
  "payload": {
    "partId": "",
    "mimeType": "multipart/mixed",
    "filename": "",
    "headers": [
      {
        "name": "MIME-Version",
        "value": "1.0"
      },
      {
        "name": "Received",
        "value": "by 10.25.23.105 with HTTP; Wed, 15 Nov 2017 16:24:34 -0800 (PST)"
      },
      {
        "name": "X-Originating-IP",
        "value": "[2601:249:e00:9093:e894:b27f:e5d6:d01d]"
      },
      {
        "name": "Date",
        "value": "Wed, 15 Nov 2017 18:24:34 -0600"
      },
      {
        "name": "Delivered-To",
        "value": "matt@chilkat.io"
      },
      {
        "name": "Message-ID",
        "value": "\u003cCAPhjyBM1qqXS6NVB65W8Zt5-McF03qWSRDjW5am66wTMuard=w@mail.gmail.com\u003e"
      },
      {
        "name": "Subject",
        "value": "Test HTML email with image and attachment."
      },
      {
        "name": "From",
        "value": "Matt Fausey \u003cmatt@chilkat.io\u003e"
      },
      {
        "name": "To",
        "value": "Matt Fausey \u003cmatt@chilkat.io\u003e"
      },
      {
        "name": "Content-Type",
        "value": "multipart/mixed; boundary=\"001a11401a6c097887055e0ea572\""
      }
    ],
    "body": {
      "size": 0
    },
    "parts": [
      {
        "partId": "0",
        "mimeType": "multipart/related",
        "filename": "",
        "headers": [
          {
            "name": "Content-Type",
            "value": "multipart/related; boundary=\"001a11401a6c097885055e0ea571\""
          }
        ],
        "body": {
          "size": 0
        },
        "parts": [
          {
            "partId": "0.0",
            "mimeType": "multipart/alternative",
            "filename": "",
            "headers": [
              {
                "name": "Content-Type",
                "value": "multipart/alternative; boundary=\"001a11401a6c097882055e0ea570\""
              }
            ],
            "body": {
              "size": 0
            },
            "parts": [
              {
                "partId": "0.0.0",
                "mimeType": "text/plain",
                "filename": "",
                "headers": [
                  {
                    "name": "Content-Type",
                    "value": "text/plain; charset=\"UTF-8\""
                  },
                  {
                    "name": "Content-Transfer-Encoding",
                    "value": "quoted-printable"
                  }
                ],
                "body": {
                  "size": 22,
                  "data": "VGhpcyBpcyBhIHRlc3QuDQrigIsNCg=="
                }
              },
              {
                "partId": "0.0.1",
                "mimeType": "text/html",
                "filename": "",
                "headers": [
                  {
                    "name": "Content-Type",
                    "value": "text/html; charset=\"UTF-8\""
                  },
                  {
                    "name": "Content-Transfer-Encoding",
                    "value": "quoted-printable"
                  }
                ],
                "body": {
                  "size": 115,
                  "data": "PGRpdiBkaXI9Imx0ciI-VGhpcyBpcyBhIHRlc3QuPGltZyB3aWR0aD0iMTIwIiBoZWlnaHQ9IjEyMCIgc3JjPSJjaWQ6aWlfamExcWY5MGwwXzE1ZmMyMzUzOWJkMDA3MjciPjxicj7igIs8L2Rpdj4NCg=="
                }
              }
            ]
          },
          {
            "partId": "0.1",
            "mimeType": "image/jpeg",
            "filename": "starfish.jpg",
            "headers": [
              {
                "name": "Content-Type",
                "value": "image/jpeg; name=\"starfish.jpg\""
              },
              {
                "name": "Content-Disposition",
                "value": "inline; filename=\"starfish.jpg\""
              },
              {
                "name": "Content-Transfer-Encoding",
                "value": "base64"
              },
              {
                "name": "Content-ID",
                "value": "\u003cii_ja1qf90l0_15fc23539bd00727\u003e"
              },
              {
                "name": "X-Attachment-Id",
                "value": "ii_ja1qf90l0_15fc23539bd00727"
              },
              {
                "name": "MIME-Version",
                "value": "1.0"
              },
              {
                "name": "Date",
                "value": "Wed, 15 Nov 2017 16:23:08 -0800"
              },
              {
                "name": "Message-ID",
                "value": "\u003cCAPhjyBMicJ9k-EXY5Efcvp8o_z_J3x8_G=mnC_znLXnyBogemQ@mail.gmail.com\u003e"
              },
              {
                "name": "Subject",
                "value": "Attachment"
              },
              {
                "name": "From",
                "value": "Matt Fausey \u003cmatt@chilkat.io\u003e"
              }
            ],
            "body": {
              "attachmentId": "ANGjdJ_ueuzzM9bpQ8l_tD27oDfn-smCe77viIAF1wy8ZeI09tK5vAuSS6V9Bahow4ikqaGleXqdQBeq8xhFkJ7WN-KKBSKvOfT2yD-XMlA1FC8AOKS2A8tBi5dDDbFrbnns33rfqEIRFAISslhdE481uB6sYfVoYjpuDThtW6Y96YA0Aso0P9txbKJwcwOeD0RxDav_vPzDjHuRuOYsGxbVTxesMB2eiMMw3i1y-WAu-pyWHqF0xMFehZmd7d-krKKdvI4UEgtzD9siXnnaH6MG55ykjBsjFRsmjKc-4K5fHeYHOf586Pkej5K238A",
              "size": 6229
            }
          }
        ]
      },
      {
        "partId": "1",
        "mimeType": "application/pdf",
        "filename": "helloWorld.pdf",
        "headers": [
          {
            "name": "Content-Type",
            "value": "application/pdf; name=\"helloWorld.pdf\""
          },
          {
            "name": "Content-Disposition",
            "value": "attachment; filename=\"helloWorld.pdf\""
          },
          {
            "name": "Content-Transfer-Encoding",
            "value": "base64"
          },
          {
            "name": "X-Attachment-Id",
            "value": "f_ja1qgya31"
          }
        ],
        "body": {
          "attachmentId": "ANGjdJ934ScA-kvdsvBvOjO9z-RYmRLyO8PvqOCzwkk-smeLVpKqeoxXNIn9FL_RbzA6qmTWKQTJehrBVmX4NqYtFsivmwRfzIWj-A-SqvJATRhjEGOntUeBS0fPZ9xy_enmH5Qgi0iSdBmwAn1CBnNghEKdMjvxTMjLxqn2mSO4gvxIh8ahJZDMN1p8KMYO98dM2XfyNndltnK-sd_DizNR9BQu10w5WSTLeFfOh61SxGKeq4Dt3W5USQlx7dEG7dRiBDvjFM6wo2HVeSnGEVphOwx80t1MQdhRN-YOHCAahIqy7Z0-BkPIIjTeUtl_pST8oMi0IgJoo9x1oomY3JZp2OxWuNyOVWDGVsDavGHc6wRhwK5pJrDceCWxNdPEwExeYA84WOAFXE2D6I3m",
          "size": 934
        }
      }
    ]
  },
  "sizeEstimate": 11716
}