(MFC) 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 C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkHttp.h>
#include <CkHttpResponse.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkHttp http;

    http.put_AuthToken("ACCESS_TOKEN");

    http.put_Accept("application/json");

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

    // Download the message using format=full
    http.SetUrlVar("id",id);

    CkHttpResponse *resp = http.QuickRequest("GET","https://www.googleapis.com/gmail/v1/users/userId/messages/{$id}?format=full");
    if (http.get_LastMethodSuccess() != true) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("Response Status Code: ");
    strOut.appendInt(resp->get_StatusCode());
    strOut.append("\r\n");

    CkJsonObject json;
    json.Load(resp->bodyStr());
    json.put_EmitCompact(false);
    strOut.append(json.emit());
    strOut.append("\r\n");

    if (resp->get_StatusCode() != 200) {
        strOut.append("Failed.");
        strOut.append("\r\n");
        delete resp;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    delete resp;

    // 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
    // }

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
    // See this example explaining how this memory should be used: const char * functions.

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

    const char *id = json.stringOf("id");
    const char *threadId = json.stringOf("threadId");
    const char *snippet = json.stringOf("snippet");
    const char *historyId = json.stringOf("historyId");
    const char *internalDate = json.stringOf("internalDate");
    const char *payloadPartId = json.stringOf("payload.partId");
    const char *payloadMimeType = json.stringOf("payload.mimeType");
    const char *payloadFilename = json.stringOf("payload.filename");
    int payloadBodySize = json.IntOf("payload.body.size");
    int sizeEstimate = json.IntOf("sizeEstimate");
    int i = 0;
    int count_i = json.SizeOfArray("labelIds");
    while (i < count_i) {
        json.put_I(i);
        strVal = json.stringOf("labelIds[i]");
        i = i + 1;
    }

    i = 0;
    count_i = json.SizeOfArray("payload.headers");
    while (i < count_i) {
        json.put_I(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");
    while (i < count_i) {
        json.put_I(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");
        bodyAttachmentId = json.stringOf("payload.parts[i].body.attachmentId");
        j = 0;
        count_j = json.SizeOfArray("payload.parts[i].headers");
        while (j < count_j) {
            json.put_J(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");
        while (j < count_j) {
            json.put_J(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");
            bodyData = json.stringOf("payload.parts[i].parts[j].body.data");
            k = 0;
            count_k = json.SizeOfArray("payload.parts[i].parts[j].headers");
            while (k < count_k) {
                json.put_K(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");
            while (k < count_k) {
                json.put_K(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");
                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");
                while (i1 < count_i1) {
                    json1->put_I(i1);
                    name = json1->stringOf("headers[i].name");
                    value = json1->stringOf("headers[i].value");
                    i1 = i1 + 1;
                }

                delete json1;
                k = k + 1;
            }

            j = j + 1;
        }

        i = i + 1;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }