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使用会话令牌

会话令牌将用户自动补全搜索的查询和选择阶段归入不同的会话，以便进行结算。以下示例展示了如何在“自动补全（新）”和“地点详情（新）”调用中使用会话令牌。

创建会话令牌

用户负责为每个会话生成唯一的会话令牌。 Google 建议使用版本 4 UUID。

发出“自动补全（新）”请求

“自动补全（新）”请求是 HTTP POST 请求。如需详细了解请求正文参数，请参阅地点自动补全（新）请求。

以下一系列请求显示了用户在搜索旧金山的一家比萨店。当用户开始输入查询时，系统会针对每次按键调用“自动补全（新）”。系统会在每次调用中将生成的会话令牌作为参数传递。

第一个请求和响应

请求 1

curl -X POST -d '{
  "input": "p",
  "sessionToken": "3519edfe-0f75-4a30-bfe4-7cbd89340b2c",
  "locationBias": {
    "circle": {
      "center": {
        "latitude": 37.7937,
        "longitude": -122.3965
      },
      "radius": 500.0
    }
  }
}' -H 'Content-Type: application/json' -H "X-Goog-Api-Key: YOUR_API_KEY" \
https://places.googleapis.com/v1/places:autocomplete

回应 1

{
  "suggestions": [
    {
      "placePrediction": {
        "place": "places/ChIJHSGzi_yAhYARnrPmDWAx9ro",
        "placeId": "ChIJHSGzi_yAhYARnrPmDWAx9ro",
        "text": {
          "text": "PIER 39, The Embarcadero, San Francisco, CA, USA",
          "matches": [
            {
              "endOffset": 1
            }
          ]
        },
        "structuredFormat": {
          "mainText": {
            "text": "PIER 39",
            "matches": [
              {
                "endOffset": 1
              }
            ]
          },
          "secondaryText": {
            "text": "The Embarcadero, San Francisco, CA, USA"
          }
        },
        "types": [
          "historical_landmark",
          "shopping_mall",
          "point_of_interest",
          "establishment",
          "marina",
          "tourist_attraction"
        ]
      }
    },
  ]
   / ... /
}

第二个请求和响应

请求 2

curl -X POST -d '{
  "input": "pi",
  "sessionToken": "3519edfe-0f75-4a30-bfe4-7cbd89340b2c",
  "locationBias": {
    "circle": {
      "center": {
        "latitude": 37.7937,
        "longitude": -122.3965
      },
      "radius": 500.0
    }
  }
}' -H 'Content-Type: application/json' -H "X-Goog-Api-Key: YOUR_API_KEY" \
https://places.googleapis.com/v1/places:autocomplete

回应 2

{
  "suggestions": [
    {
      "placePrediction": {
        "place": "places/ChIJHSGzi_yAhYARnrPmDWAx9ro",
        "placeId": "ChIJHSGzi_yAhYARnrPmDWAx9ro",
        "text": {
          "text": "PIER 39, The Embarcadero, San Francisco, CA, USA",
          "matches": [
            {
              "endOffset": 2
            }
          ]
        },
        "structuredFormat": {
          "mainText": {
            "text": "PIER 39",
            "matches": [
              {
                "endOffset": 2
              }
            ]
          },
          "secondaryText": {
            "text": "The Embarcadero, San Francisco, CA, USA"
          }
        },
        "types": [
          "establishment",
          "point_of_interest",
          "shopping_mall",
          "marina",
          "historical_landmark",
          "tourist_attraction"
        ]
      }
    },
  /.../
  ]
}

第三个请求和响应

请求 3

curl -X POST -d '{
  "input": "piz",
  "sessionToken": "3519edfe-0f75-4a30-bfe4-7cbd89340b2c",
  "locationBias": {
    "circle": {
      "center": {
        "latitude": 37.7937,
        "longitude": -122.3965
      },
      "radius": 500.0
    }
  }
}' -H 'Content-Type: application/json' -H "X-Goog-Api-Key: YOUR_API_KEY" https://places.googleapis.com/v1/places:autocomplete

回应 3

{
  "suggestions": [
    {
      "placePrediction": {
        "place": "places/ChIJ_QJSSfGAhYARQVFJBNKy3HE",
        "placeId": "ChIJ_QJSSfGAhYARQVFJBNKy3HE",
        "text": {
          "text": "Pizza By The Slice, Grant Avenue, San Francisco, CA, USA",
          "matches": [
            {
              "endOffset": 3
            }
          ]
        },
        "structuredFormat": {
          "mainText": {
            "text": "Pizza By The Slice",
            "matches": [
              {
                "endOffset": 3
              }
            ]
          },
          "secondaryText": {
            "text": "Grant Avenue, San Francisco, CA, USA"
          }
        },
        "types": [
          "establishment",
          "point_of_interest",
          "food",
          "pizza_restaurant",
          "restaurant"
        ]
      }
    },
  /.../
  ]
}

结束会话

通过向“地点详情（新）”或“地址验证”发出请求并传递与“自动补全（新）”请求相同的会话令牌来终止会话。

发出“地点详情（新）”请求

“地点详情（新）”请求是一个 HTTP GET 请求。如需详细了解请求正文参数，请参阅地点详情（新）请求。

以下“地点详情（新）”请求包含所选地点的 id 以及之前的“自动补全（新）”调用中使用的 sessionToken。

curl -X GET -H 'Content-Type: application/json' \
-H "X-Goog-Api-Key: YOUR_API_KEY" \
-H "X-Goog-FieldMask: id,displayName,accessibilityOptions,businessStatus" \
https://places.googleapis.com/v1/places/ChIJ_QJSSfGAhYARQVFJBNKy3HE?sessionToken=3519edfe-0f75-4a30-bfe4-7cbd89340b2c

使用 ChIJ_QJSSfGAhYARQVFJBNKy3HE 的地点 id，该调用会生成以下 JSON 响应：

{
  "id": "ChIJ_QJSSfGAhYARQVFJBNKy3HE",
  "businessStatus": "OPERATIONAL",
  "displayName": {
    "text": "Pizza By The Slice",
    "languageCode": "en"
  },
  "accessibilityOptions": {
    "wheelchairAccessibleParking": false,
    "wheelchairAccessibleEntrance": true
  }
}

发出地址验证请求

地址验证请求是 HTTP POST 请求。如需详细了解请求正文参数，请参阅发送地址验证请求。

以下地址验证请求包含所选地点的地址（位于“地点自动补全（新）”响应的 text 字段中），以及之前的“地点自动补全（新）”调用中使用的 sessionToken。 
    curl -X POST -d '{
      "sessionToken": "3519edfe-0f75-4a30-bfe4-7cbd89340b2c",
      "address": {
        "addressLines": "Pizza By The Slice, Grant Avenue, San Francisco, CA, USA"
      }
    }' \
    -H 'Content-Type: application/json' \
    "https://addressvalidation.googleapis.com/v1:validateAddress?key=YOUR_API_KEY"

该调用会生成以下 JSON 响应：

    {
      "result": {
        "verdict": {
          "inputGranularity": "PREMISE",
          "validationGranularity": "PREMISE",
          "geocodeGranularity": "PREMISE",
          "hasInferredComponents": true
        },
        "address": {
          "formattedAddress": "Pizza By The Slice, Grant Avenue, San Francisco, CA 94133, USA",
          "postalAddress": {
            "regionCode": "US",
            "languageCode": "en",
            "postalCode": "94133",
            "administrativeArea": "CA",
            "locality": "San Francisco",
            "addressLines": [
              "Pizza By The Slice",
              "Grant Ave"
            ]
          },
          "addressComponents": [
            {
              "componentName": {
                "text": "Pizza By The Slice",
                "languageCode": "en"
              },
              "componentType": "point_of_interest",
              "confirmationLevel": "CONFIRMED"
            },
            {
              "componentName": {
                "text": "Grant Avenue",
                "languageCode": "en"
              },
              "componentType": "route",
              "confirmationLevel": "CONFIRMED"
            },
            {
              "componentName": {
                "text": "San Francisco",
                "languageCode": "en"
              },
              "componentType": "locality",
              "confirmationLevel": "CONFIRMED"
            },
            {
              "componentName": {
                "text": "CA",
                "languageCode": "en"
              },
              "componentType": "administrative_area_level_1",
              "confirmationLevel": "CONFIRMED"
            },
            {
              "componentName": {
                "text": "USA",
                "languageCode": "en"
              },
              "componentType": "country",
              "confirmationLevel": "CONFIRMED"
            },
            {
              "componentName": {
                "text": "94133"
              },
              "componentType": "postal_code",
              "confirmationLevel": "CONFIRMED",
              "inferred": true
            }
          ],
          "missingComponentTypes": [
            "street_number"
          ]
        },
        "geocode": {
          "location": {
            "latitude": 37.800504,
            "longitude": -122.4074794
          },
          "plusCode": {
            "globalCode": "849VRH2V+62"
          },
          "bounds": {
            "low": {
              "latitude": 37.800504,
              "longitude": -122.4074794
            },
            "high": {
              "latitude": 37.800504,
              "longitude": -122.4074794
            }
          },
          "featureSizeMeters": 10,
          "placeId": "ChIJ_QJSSfGAhYARQVFJBNKy3HE",
          "placeTypes": [
            "food",
            "restaurant",
            "point_of_interest",
            "establishment"
          ]
        },
        "uspsData": {
          "standardizedAddress": {
            "firstAddressLine": "PIZZA BY THE SLICE",
            "secondAddressLine": "GRANT AVE",
            "cityStateZipAddressLine": "SAN FRANCISCO",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "zipCode": "94133"
          },
          "dpvFootnote": "A1M1",
          "postOfficeCity": "SAN FRANCISCO",
          "postOfficeState": "CA"
        }
      },
      "responseId": "4b669675-2c3b-463a-ae20-400248cf6ac9"
    }

放弃会话

如果用户放弃会话，会话将终止。例如，如果用户开始搜索比萨店，但未选择地点（触发“地点详情（新）”调用）或验证地址（触发“地址验证”调用），则会话会终止，并且会话令牌会过期。

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