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} | } | ||
The property named "mozDeviceIndexedDB" defines permissions for access control of DeviceIndexedDB databases. The children of " | The property named "mozDeviceIndexedDB" defines permissions for access control of DeviceIndexedDB databases. The children of "mozDeviceIndexedDB" are names of databases. Databases not in the children of a "mozDeviceIndexedDB" of an App can not be accessed by the App. | ||
The children of a database is names of data stores. Data stores not in the children of a database can not be accessed by the App. The "ObjectStore" property defines whether the App can read or read-write a data store. If the value of "ObjectStore" is "none", it means the App can not read or write the data store, but it can access indices according setting in "index" child of the data store. | The children of a database is names of data stores. Data stores not in the children of a database can not be accessed by the App. The "ObjectStore" property defines whether the App can read or read-write a data store. If the value of "ObjectStore" is "none", it means the App can not read or write the data store, but it can access indices according setting in "index" child of the data store. | ||
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Following is an example of finding Apps providing DataCloudStorage services with DeviceIndexedDB as the application chooser. | Following is an example of finding Apps providing DataCloudStorage services with DeviceIndexedDB as the application chooser. | ||
var request = window. | var request = window.mozDeviceIndexedDB.open("[SystemServices]"); | ||
request.onsuccess = function () { | request.onsuccess = function () { | ||
var db = request.result; | var db = request.result; | ||
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name: "My Applicaiton", | name: "My Applicaiton", | ||
...... | ...... | ||
mozDeviceIndexedDB: { | |||
"[SystemServices]": { | "[SystemServices]": { | ||
"Applications": { | "Applications": { | ||
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Since "[SystemServices]" database is implemented by the platform code, writing actions may be forbidden by the implementation according the security model of the data. | Since "[SystemServices]" database is implemented by the platform code, writing actions may be forbidden by the implementation according the security model of the data. | ||
=== Expose Network Statistic of Apps === | |||
This is an example of exposing network statistics of Apps with DeviceIndexedDB. | |||
var request = window.mozDeviceIndexedDB.open("[SystemServices]"); | |||
request.onsuccess = function () { | |||
var db = request.result; | |||
var tx = db.transaction("NetworkStatistics"); | |||
var store = tx.objectStore("NetworkStatistics"); | |||
var apps = store.index("apps"); | |||
var statisrequest = apps.get("any-app-id"); | |||
statisrequest.onsuccess = function () { | |||
var statistic = statisrequest.result; | |||
showStatisticForApp(statistic); | |||
} | |||
} | |||
{ | |||
name: "My Applicaiton", | |||
...... | |||
mozDeviceIndexedDB: { | |||
"[SystemServices]": { | |||
"NetworkStatistics": { | |||
"ObjectStore": "none", | |||
"index": { | |||
"apps": ["any-app-id"], | |||
} | |||
} | |||
} | |||
} | |||
} | |||
[[Category:Web APIs]] | |||