wget 无法再下载雅虎财经数据

Question

从几周前开始，我就无法再下载 Yahoo 财务数据了：

$ wget -O GLD.USA_20170612.txt --no-check-certificate http://chart.finance.yahoo.com/table.csv?s=GLD&a=2&b=1&c=2017&d=11&e=30&f=2017&ignore=.csv
--2017-06-12 12:21:28--  http://gld.usa_20170612.txt/
Resolving gld.usa_20170612.txt (gld.usa_20170612.txt)... failed: No address associated with hostname.
wget: unable to resolve host address ‘gld.usa_20170612.txt’
--2017-06-12 12:21:28--  http://chart.finance.yahoo.com/table.csv?s=GLD&a=2&b=1&c=2017&d=11&e=30&f=2017
Resolving chart.finance.yahoo.com (chart.finance.yahoo.com)... 87.248.114.12, 87.248.116.11, 87.248.116.12, ...
Connecting to chart.finance.yahoo.com (chart.finance.yahoo.com)|87.248.114.12|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://chart.finance.yahoo.com/table.csv?s=GLD&a=2&b=1&c=2017&d=11&e=30&f=2017 [following]
--2017-06-12 12:21:28--  https://chart.finance.yahoo.com/table.csv?s=GLD&a=2&b=1&c=2017&d=11&e=30&f=2017
Connecting to chart.finance.yahoo.com (chart.finance.yahoo.com)|87.248.114.12|:443... connected.
HTTP request sent, awaiting response... 404 Not Found
2017-06-12 12:21:28 ERROR 404: Not Found.

他们改变了一些东西。我从网站上选择了一个新的 URL，但它仍然不起作用：

$ wget https://query1.finance.yahoo.com/v7/finance/download/GLD?period1=1494584558&period2=1497262958&interval=1d&events=history&crumb=GGHpj6ucgIy
--2017-06-12 12:27:24--  https://query1.finance.yahoo.com/v7/finance/download/GLD?period1=1494584558
Resolving query1.finance.yahoo.com (query1.finance.yahoo.com)... 87.248.116.11, 87.248.116.12, 87.248.114.11, ...
Connecting to query1.finance.yahoo.com (query1.finance.yahoo.com)|87.248.116.11|:443... connected.
HTTP request sent, awaiting response... 401 Unauthorized

Username/Password Authentication Failed.

我不明白为什么它提到了用户名和密码。当我单击https://uk.finance.yahoo.com/quote/GLD/history?p=GLD 的下载按钮时，它不会要求输入用户名和密码。所以好像不用订阅也可以下载数据。

如果有人知道下载雅虎财务数据的正确 wget 实现，请在此处分享。

...

更新：

感谢当前的回复，我被暗示这里可能涉及“cookies”。在搜索关键字中cookie的类似问题时，我发现了以下线程：

Yahoo Finance Historical data downloader url is not working

Yahoo Finance URL not working

不幸的是，这对我来说太复杂了...... 如果能帮我完成这项工作，我将不胜感激。

Answer 1

为了处理 Yahoo cokies，我编写了以下代码：

#!/usr/bin/sh

symbol=$1
today=$(date +%Y%m%d)
tomorrow=$(date --date='1 days' +%Y%m%d)

first_date=$(date -d "$2" '+%s')
last_date=$(date -d "$today" '+%s')

wget --no-check-certificate --save-cookies=cookie.txt https://finance.yahoo.com/quote/$symbol/?p=$symbol -O crumb.store

crumb=$(grep 'root.*App' crumb.store | sed 's/,/\n/g' | grep CrumbStore | sed 's/"CrumbStore":{"crumb":"\(.*\)"}/\1/')

wget --no-check-certificate --load-cookies=cookie.txt "https://query1.finance.yahoo.com/v7/finance/download/$symbol?period1=$first_date&period2=$last_date&interval=1d&events=history&crumb=$crumb" -O $symbol.csv

rm cookie.txt crumb.store

使用示例：

$ sh stockdownload_yahoo.sh QQQ 20170508

支持的日期格式示例：

$ date -d 20170328 +%s
1490652000
$ date -d 2017-03-28 +%s
1490652000
$ date -d "Mar 28 2017" +%s
1490652000