预取

Last update: Sat Jul 20 2024 00:00:00 GMT+0000 (Coordinated Universal Time)

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预取功能允许移动设备应用程序和服务器等客户端在一个请求中为多个mbox或视图获取内容，并将其缓存在本地，然后在访客访问这些mbox或视图时通知Target。

使用预取时，请务必熟悉以下术语：

字段名称

描述

prefetch

应获取但不应标记为已访问的mbox和视图的列表。 Target Edge为预取数组中存在的每个mbox或视图返回eventToken。

notifications

之前预取并应标记为已访问的mbox和视图的列表。

eventToken

在预取内容时返回的哈希加密令牌。此令牌应发送回notifications阵列中的Target。

预取Mbox

客户端（如移动应用程序和服务器）可以在一个会话中为给定访客预取多个mbox并将其缓存，以避免对Adobe Target Delivery API进行多次调用。

curl -X POST \
'https://demo.tt.omtrdc.net/rest/v1/delivery?client=demo&sessionId=7abf6304b2714215b1fd39a870f01afc#1555632114' \
-H 'Content-Type: application/json' \
-H 'cache-control: no-cache' \
-d '
{
  "id": {
    "tntId": "abcdefghijkl00023.1_1"
  },
  "context": {
    "channel": "web",
    "browser" : {
      "host" : "demo"
    },
    "address" : {
      "url" : "http://demo.dev.tt-demo.com/demo/store/index.html"
    },
    "screen" : {
      "width" : 1200,
      "height": 1400
    }
  },
    "prefetch": {
    "mboxes" : [
      {
        "name" : "SummerOffer",
        "index" : 1
      },
      {
        "name" : "SummerShoesOffer",
        "index" : 2
      },
      {
        "name" : "SummerDressOffer",
        "index" : 3
      }
    ]
  }
}'

在prefetch字段中，为会话中的访客添加一个或多个要至少预取一次的mboxes。预取这些mboxes后，您将收到以下响应：

{
    "status": 200,
    "requestId": "5efee0d8-3779-4b12-a74e-e04848faf191",
    "client": "demo",
    "id": {
        "tntId": "abcdefghijkl00023.1_1"
    },
    "edgeHost": "mboxedge28.tt.omtrdc.net",
    "prefetch": {
        "mboxes": [
            {
                "index": 1,
                "name": "SummerOffer",
                "options": [
                    {
                        "content": "<p><b>Enjoy this 15% discount on your next purchase</b></p>",
                        "type": "html",
                        "eventToken": "GcvBXDhdJFNR9E9r1tgjfmqipfsIHvVzTQxHolz2IpSCnQ9Y9OaLL2gsdrWQTvE54PwSz67rmXWmSnkXpSSS2Q==",
                    }
                ]
            },
            {
                "index": 2,
                "name": "SummerShoesOffer",
                "options": [
                    {
                        "content": "<p><b>Enjoy this 15% discount on your next shoe purchase</b></p>"
                        "type": "html",
                        "eventToken": "GcvBXDhdJFNR9E9r1tgjfmqipfsIHvVzTQxHolz2IpSCnQ9Y9OaLL2gsdrWQTvE54PwSz67rmXWmSnkXpSSS2Q==",
                    }
                ]
            },
            {
                "index": 3,
                "name": "SummerDressOffer",
                "options": [
                    {
                        "content": "<p><b>Enjoy this 15% discount on your next dress purchase</b></p>"
                        "type": "html",
                        "eventToken": "GcvBXDhdJFNR9E9r1tgjfmqipfsIHvVzTQxHolz2IpSCnQ9Y9OaLL2gsdrWQTvE54PwSz67rmXWmSnkXpSSS2Q==",
                    }
                ]
            }
        ]
    }
}

在响应中，您会看到包含要向访客显示的特定mbox体验的content字段。当缓存到您的服务器上时，这非常有用，这样当访客在会话中与您的Web或移动应用程序交互并在应用程序的任何特定页面上访问mbox时，可以从缓存中传递体验，而不是再次进行Adobe Target Delivery API调用。但是，当从mbox向访客交付体验时，将通过投放API调用发送notification，以进行展示日志记录。这是因为已缓存prefetch调用的响应，这意味着访客在执行prefetch调用时未看到体验。若要了解有关notification进程的更多信息，请参阅通知。

使用Analytics for Target (A4T)时通过`clickTrack`指标预取mbox

Adobe Analytics for Target (A4T)是一种跨解决方案的集成，通过它，可根据Analytics转化量度和受众区段创建活动。

以下代码片段是预获取包含clickTrack个量度的mbox时发出的响应，用于通知Analytics已单击某个选件：

{
  "prefetch": {
    "mboxes": [
      {
        "index": 0,
        "name": "<mboxName>",
        "options": [
           ...
        ],
        "metrics": [
          {
            "type": "click",
            "eventToken": "<eventToken>",
             "analytics": {
               "payload": {
                 "pe": "tnt",
                 "tnta": "..."
               }
             }
          },
          }
        ],
        "analytics": {
          "payload": {
            "pe": "tnt",
            "tnta": "347565:1:0|2,347565:1:0|1"
          }
        }
      }
    ]
  }
}

NOTE

mbox的预获取仅包含符合条件的活动的Analytics有效负荷。预取尚未符合条件的活动的成功量度会导致报表不一致。

预取视图

视图可以更加无缝地支持单页应用程序(SPA)和移动应用程序。视图可以视为视觉元素的逻辑组，这些元素共同构成了SPA或移动设备体验。现在，通过投放API，VEC创建的A/B Test和Experience Targeting (X)T活动现在可以预取对SPA🔗的视图进行修改的。

curl -X POST \
  'https://demo.tt.omtrdc.net/rest/v1/delivery?client=demo&sessionId=a3e7368c62d944c0855d424cd7a03ab0' \
  -H 'Content-Type: application/json' \
  -H 'cache-control: no-cache' \
  -d '{
  "id": {
    "tntId": "84e8d0e211054f18af365d65f45e902b.28_131"
  },
  "context": {
    "channel": "web",
    "window": {
      "width": 1819,
      "height": 842
    },
    "browser": {
      "host": "target.enablementadobe.com"
    },
    "address": {
      "url": "https://target.enablementadobe.com/react/demo/#/"
    }
  },
  "prefetch": {
    "views": [{}]
  }
}'

上述示例调用预取通过SPA VEC为A/B Test创建的所有视图，并预取为Web channel显示的XT活动。请注意，调用会预取具有tntId：84e8d0e211054f18af365d65f45e902b.28_131的访客访问url：https://target.enablementadobe.com/react/demo/#/时有资格参加的A/B Test或XT活动的所有视图。

{
    "status": 200,
    "requestId": "14ce028e-d2d2-4504-b3da-32740fa8dd61",
    "client": "demo",
    "id": {
        "tntId": "84e8d0e211054f18af365d65f45e902b.28_131"
    },
    "edgeHost": "mboxedge28.tt.omtrdc.net",
    "prefetch": {
        "views": [
            {
                "id": 228,
                "name": "checkout-express",
                "key": "checkout-express",
                "state": "Vqfb6kYGAmzWOLf9W6E+Q/0LyS+SYe2h5tuTXzRNnkjKkZaZZr2ijp41/6AwK6fdFgADhFNC7l5efUCs9shgTw==",
                "options": [
                    {
                        "content": [
                            {
                                "type": "setHtml",
                                "selector": "#app > DIV:nth-of-type(1) > DIV:nth-of-type(2) > SECTION.section:eq(0) > DIV.container:eq(0) > FORM.col-md-4:eq(0) > DIV:nth-of-type(1) > DIV.mb-3:eq(2)",
                                "cssSelector": "#app > DIV:nth-of-type(1) > DIV:nth-of-type(2) > SECTION:nth-of-type(1) > DIV:nth-of-type(1) > FORM:nth-of-type(2) > DIV:nth-of-type(1) > DIV:nth-of-type(3)",
                                "content": "<span style=\"color:#000080;\"><strong>*We charge an additional fee of $12.34 for faster delivery. If you choose express delivery get 15% off on your next order.</strong></span>"
                            }
                        ],
                        "type": "actions",
                        "eventToken": "N3C13I0M2PH8iaKtONJlFJNWHtnQtQrJfmRrQugEa2qCnQ9Y9OaLL2gsdrWQTvE54PwSz67rmXWmSnkXpSSS2Q=="
                    }
                ]
            },
            {
                "id": 5,
                "name": "home",
                "key": "home",
                "state": "Vqfb6kYGAmzWOLf9W6E+Q/0LyS+SYe2h5tuTXzRNnkjKkZaZZr2ijp41/6AwK6fdFgADhFNC7l5efUCs9shgTw==",
                "options": [
                    {
                        "content": [
                            {
                                "type": "setHtml",
                                "selector": "#app > DIV:nth-of-type(1) > DIV:nth-of-type(2) > SECTION.section:eq(0) > DIV.container:eq(1) > DIV.heading:eq(0) > H1.title:eq(0)",
                                "cssSelector": "#app > DIV:nth-of-type(1) > DIV:nth-of-type(2) > SECTION:nth-of-type(1) > DIV:nth-of-type(2) > DIV:nth-of-type(1) > H1:nth-of-type(1)",
                                "content": "<span style=\"color:#800000;\"><strong>Trending Items</strong></span>"
                            }
                        ],
                        "type": "actions",
                        "eventToken": "N3C13I0M2PH8iaKtONJlFJNWHtnQtQrJfmRrQugEa2qCnQ9Y9OaLL2gsdrWQTvE54PwSz67rmXWmSnkXpSSS2Q=="
                    }
                ]
            },
            {
                "id": 6,
                "name": "products",
                "key": "products",
                "state": "Vqfb6kYGAmzWOLf9W6E+Q/0LyS+SYe2h5tuTXzRNnkjKkZaZZr2ijp41/6AwK6fdFgADhFNC7l5efUCs9shgTw==",
                "options": [
                    {
                        "content": [
                            {
                                "type": "setStyle",
                                "selector": "#app > DIV:nth-of-type(1) > DIV:nth-of-type(2) > SECTION.section:eq(0) > DIV.container:eq(0) > DIV.heading:eq(0) > BUTTON.btn:eq(0)",
                                "cssSelector": "#app > DIV:nth-of-type(1) > DIV:nth-of-type(2) > SECTION:nth-of-type(1) > DIV:nth-of-type(1) > DIV:nth-of-type(1) > BUTTON:nth-of-type(1)",
                                "content": {
                                    "background-color": "rgba(191,0,0,1)",
                                    "priority": "important"
                                }
                            }
                        ],
                        "type": "actions",
                        "eventToken": "N3C13I0M2PH8iaKtONJlFJNWHtnQtQrJfmRrQugEa2qCnQ9Y9OaLL2gsdrWQTvE54PwSz67rmXWmSnkXpSSS2Q=="
                    }
                ]
            }
        ]
    }
}

在响应的content字段中，记下元数据，如type、selector、cssSelector和content，这些元数据用于在用户访问您的页面时向访客呈现体验。请注意，如有必要，可以缓存prefetched内容并将其呈现给用户。

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预取

预取Mbox

使用Analytics for Target (A4T)时通过clickTrack指标预取mbox

预取视图

使用Analytics for Target (A4T)时通过`clickTrack`指标预取mbox