【发布时间】：2022-07-25 18:42:12
【问题描述】：
Firefox 文件sessionstore-backups/recovery.jsonlz4 包含有关当前 Firefox 窗口（压缩）JSON 格式的信息。这是代表该文件的简化格式：
{
"index": 2,
"entries": [
{
"title": "Foo bar 0",
"url": "https://example.com/bar"
},
{
"title": "Foo bar 1",
"url": "https://example.com/bar"
},
{
"title": "Foo bar 2",
"url": "https://example.com/bar"
}
]
}
index 字段表示每个选项卡当前显示的历史记录项。以 1 为索引，在上面的示例中，它表示“Foo bar 1”条目。
如何使用jq 中的值来获取该选项卡？
为了在您自己的系统上进行测试，以下 bash 行将使您在大多数现代 Linux 系统上达到这一点：
lz4jsoncat ~/.mozilla/firefox/t6e99qbe.default-release/sessionstore-backups/recovery.jsonlz4 | jq '.windows[0].tabs' | jq 'sort_by(.lastAccessed)[-1]'
这将返回最近的选项卡，但所有历史记录项都在 entries 数组中。由于用户可以在历史中导航回来，我们需要index 值来确定要返回哪个条目。通过gron 传输，它看起来像这样：
json = {};
json.attributes = {};
json.entries = [];
json.entries[0] = {};
json.entries[0].ID = 504;
json.entries[0].cacheKey = 0;
json.entries[0].docIdentifier = 586;
json.entries[0].docshellUUID = "{b6c1e18a-d0f5-4ba2-996e-ddd9fc28322a}";
json.entries[0].hasUserInteraction = true;
json.entries[0].persist = true;
json.entries[0].principalToInherit_base64 = "eyIxIjp7IjAiOiJtb3otZXh0ZW5zaW9uOi8vOTAzYWU2NDgtMzRlNi00NGQ3LTg0NjYtYzgxMWQyMTg2YjBkLyJ9fQ==";
json.entries[0].resultPrincipalURI = null;
json.entries[0].title = "Tridactyl Top Tips & New Tab Page";
json.entries[0].triggeringPrincipal_base64 = "eyIxIjp7IjAiOiJtb3otZXh0ZW5zaW9uOi8vOTAzYWU2NDgtMzRlNi00NGQ3LTg0NjYtYzgxMWQyMTg2YjBkLyJ9fQ==";
json.entries[0].url = "moz-extension://7ba85bcd-8d63-4e74-a723-e627a31d6274/static/newtab.html";
json.entries[1] = {};
json.entries[1].ID = 506;
json.entries[1].cacheKey = 0;
json.entries[1].docIdentifier = 588;
json.entries[1].docshellUUID = "{b6c1e18a-d0f5-4ba2-996e-ddd9fc28322a}";
json.entries[1].hasUserInteraction = true;
json.entries[1].persist = true;
json.entries[1].referrerInfo = "BBoSnxDOS9qmDeAnom1e0AAAAAAAAAAAwAAAAAAAAEYAAAAAAAEBAAAAAAEA";
json.entries[1].resultPrincipalURI = null;
json.entries[1].title = "Stack Overflow - Where Developers Learn, Share, & Build Careers";
json.entries[1].triggeringPrincipal_base64 = "eyIzIjp7fX0=";
json.entries[1].url = "https://stackoverflow.com/";
json.entries[2] = {};
json.entries[2].ID = 508;
json.entries[2].cacheKey = 0;
json.entries[2].csp = "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";
json.entries[2].docIdentifier = 590;
json.entries[2].docshellUUID = "{b6c1e18a-d0f5-4ba2-996e-ddd9fc28322a}";
json.entries[2].hasUserInteraction = true;
json.entries[2].persist = true;
json.entries[2].principalToInherit_base64 = "eyIxIjp7IjAiOiJodHRwczovL3N0YWNrb3ZlcmZsb3cuY29tLyJ9fQ==";
json.entries[2].referrerInfo = "BBoSnxDOS9qmDeAnom1e0AAAAAAAAAAAwAAAAAAAAEYBAAAAGmh0dHBzOi8vc3RhY2tvdmVyZmxvdy5jb20vAAAACAEBAAAAGmh0dHBzOi8vc3RhY2tvdmVyZmxvdy5jb20vAQE=";
json.entries[2].resultPrincipalURI = null;
json.entries[2].title = "Highest scored questions - Stack Overflow";
json.entries[2].triggeringPrincipal_base64 = "eyIxIjp7IjAiOiJodHRwczovL3N0YWNrb3ZlcmZsb3cuY29tLyJ9fQ==";
json.entries[2].url = "https://stackoverflow.com/questions";
json.entries[3] = {};
json.entries[3].ID = 510;
json.entries[3].cacheKey = 0;
json.entries[3].csp = "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";
json.entries[3].docIdentifier = 592;
json.entries[3].docshellUUID = "{b6c1e18a-d0f5-4ba2-996e-ddd9fc28322a}";
json.entries[3].hasUserInteraction = true;
json.entries[3].persist = true;
json.entries[3].principalToInherit_base64 = "eyIxIjp7IjAiOiJodHRwczovL3N0YWNrb3ZlcmZsb3cuY29tL3F1ZXN0aW9ucyJ9fQ==";
json.entries[3].referrerInfo = "BBoSnxDOS9qmDeAnom1e0AAAAAAAAAAAwAAAAAAAAEYBAAAAI2h0dHBzOi8vc3RhY2tvdmVyZmxvdy5jb20vcXVlc3Rpb25zAAAACAEBAAAAI2h0dHBzOi8vc3RhY2tvdmVyZmxvdy5jb20vcXVlc3Rpb25zAQE=";
json.entries[3].resultPrincipalURI = null;
json.entries[3].title = "Tags - Stack Overflow";
json.entries[3].triggeringPrincipal_base64 = "eyIxIjp7IjAiOiJodHRwczovL3N0YWNrb3ZlcmZsb3cuY29tL3F1ZXN0aW9ucyJ9fQ==";
json.entries[3].url = "https://stackoverflow.com/tags";
json.entries[4] = {};
json.entries[4].ID = 512;
json.entries[4].cacheKey = 0;
json.entries[4].csp = "CdntGuXUQAS/4CfOuSPZrAAAAAAAAAAAwAAAAAAAAEYB3pRy0IA0EdOTmQAQS6D9QJIHOlRteE8wkTq4cYEyCMYAAAAC/////wAAAbsBAAAAHmh0dHBzOi8vc3RhY2tvdmVyZmxvdy5jb20vdGFncwAAAAAAAAAFAAAACAAAABEAAAAI/////wAAAAj/////AAAACAAAABEAAAAZAAAABQAAABkAAAAFAAAAGQAAAAEAAAAaAAAABAAAABr/////AAAAAP////8AAAAZ/////wAAABn/////AQAAAAAAAAAAACx7IjEiOnsiMCI6Imh0dHBzOi8vc3RhY2tvdmVyZmxvdy5jb20vdGFncyJ9fQAAAAEAAABLAHUAcABnAHIAYQBkAGUALQBpAG4AcwBlAGMAdQByAGUALQByAGUAcQB1AGUAcwB0AHMAOwAgAGYAcgBhAG0AZQAtAGEAbgBjAGUAcwB0AG8AcgBzACAAJwBzAGUAbABmACcAIABoAHQAdABwAHMAOgAvAC8AcwB0AGEAYwBrAGUAeABjAGgAYQBuAGcAZQAuAGMAbwBtAAA=";
json.entries[4].docIdentifier = 594;
json.entries[4].docshellUUID = "{b6c1e18a-d0f5-4ba2-996e-ddd9fc28322a}";
json.entries[4].hasUserInteraction = false;
json.entries[4].persist = true;
json.entries[4].principalToInherit_base64 = "eyIxIjp7IjAiOiJodHRwczovL3N0YWNrb3ZlcmZsb3cuY29tL3RhZ3MifX0=";
json.entries[4].referrerInfo = "BBoSnxDOS9qmDeAnom1e0AAAAAAAAAAAwAAAAAAAAEYBAAAAHmh0dHBzOi8vc3RhY2tvdmVyZmxvdy5jb20vdGFncwAAAAgBAQAAAB5odHRwczovL3N0YWNrb3ZlcmZsb3cuY29tL3RhZ3MBAQ==";
json.entries[4].resultPrincipalURI = null;
json.entries[4].title = "Users - Stack Overflow";
json.entries[4].triggeringPrincipal_base64 = "eyIxIjp7IjAiOiJodHRwczovL3N0YWNrb3ZlcmZsb3cuY29tL3RhZ3MifX0=";
json.entries[4].url = "https://stackoverflow.com/users";
json.hidden = false;
json.index = 3;
json.lastAccessed = 1651407567904;
json.requestedIndex = 0;
json.searchMode = null;
json.userContextId = 0
【问题讨论】：