捕获和转换Web的工具

使用Ruby从网站捕获HTML表Ruby API

转换HTML表格 into使用JSON,CSV和Excel电子表格 GrabzIt的Ruby API 在东部,请按照此处显示的示例操作。 但是,在开始之前,请记住 url_to_table, html_to_table or file_to_table 方法 save or save_to 必须调用方法来捕获表。 如果您想快速查看此服务是否适合您,可以尝试 捕获HTML表的实时演示 从URL。

基本选项

下面的示例转换指定网页中的第一个HTML表 intoa CSV文件。

grabzItClient.url_to_table("https://www.tesla.com")
# Then call the save or save_to method
grabzItClient.html_to_table("<html><body><table><tr><th>Name</th><th>Age</th></tr>
    <tr><td>Tom</td><td>23</td></tr><tr><td>Nicola</td><td>26</td></tr>
    </table></body></html>")
# Then call the save or save_to method
grabzItClient.file_to_table("tables.html")
# Then call the save or save_to method

如果您不想自动转换网页中的第一个表格,则可以指定 tableNumberToInclude 方法。 例如,指定2将转换网页中找到的第二个表。

grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.tableNumberToInclude = 2

grabzItClient.url_to_table("https://www.tesla.com", options)
# Then call the save or save_to method
grabzItClient.save_to("result.csv"
grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.tableNumberToInclude = 2

grabzItClient.html_to_table("<html><body><table><tr><th>Name</th><th>Age</th></tr>
    <tr><td>Tom</td><td>23</td></tr><tr><td>Nicola</td><td>26</td></tr>
    </table></body></html>", options)
# Then call the save or save_to method
grabzItClient.save_to("result.csv")
grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.tableNumberToInclude = 2

grabzItClient.file_to_table("tables.html", options)
# Then call the save or save_to method
grabzItClient.save_to("result.csv")

您还可以指定 targetElement 确保只转换指定元素ID中的表的方法。

grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.targetElement = "stocks_table"

grabzItClient.url_to_table("https://www.tesla.com", options)
# Then call the save or save_to method
grabzItClient.save_to("result.csv")
grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.targetElement = "stocks_table"

grabzItClient.html_to_table("<html><body><table id='stocks_table'><tr><th>Name</th><th>Age</th></tr>
    <tr><td>Tom</td><td>23</td></tr><tr><td>Nicola</td><td>26</td></tr>
    </table></body></html>", options)
# Then call the save or save_to method
grabzItClient.save_to("result.csv")
grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.targetElement = "stocks_table"

grabzItClient.file_to_table("tables.html", options)
# Then call the save or save_to method
grabzItClient.save_to("result.csv")

如果您使用XLSX格式,则可以通过将true传递给 includeAllTables 方法。 然后,这会将每个表放在电子表格工作簿的新工作表中。

grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.format = "xlsx"
options.includeAllTables = true

grabzItClient.url_to_table("https://www.tesla.com", options)
# Then call the save or save_to method
grabzItClient.save_to("result.xlsx")
grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.format = "xlsx"
options.includeAllTables = true

grabzItClient.html_to_table("<html><body><table><tr><th>Name</th><th>Age</th></tr>
    <tr><td>Tom</td><td>23</td></tr><tr><td>Nicola</td><td>26</td></tr>
    </table></body></html>", options)
# Then call the save or save_to method
grabzItClient.save_to("result.xlsx")
grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.format = "xlsx"
options.includeAllTables = true

grabzItClient.file_to_table("tables.html", options)
# Then call the save or save_to method
grabzItClient.save_to("result.xlsx")

将HTML表转换为JSON

借助GrabzIt,Ruby可以轻松转换HTML表 into JSON来指定 json 在format参数中。 在下面的示例中,读取了数据 同步地 通过使用 save_to 方法,将JSON作为 string。 然后可以通过类似的库来解析 json宝石.

grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.format = "json"
options.tableNumberToInclude = 1

grabzItClient.url_to_table("https://www.tesla.com", options)

json = grabzItClient.save_to()
grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.format = "json"
options.tableNumberToInclude = 1

grabzItClient.html_to_table("<html><body><table><tr><th>Name</th><th>Age</th></tr>
    <tr><td>Tom</td><td>23</td></tr><tr><td>Nicola</td><td>26</td></tr>
    </table></body></html>", options)

json = grabzItClient.save_to()
grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.format = "json"
options.tableNumberToInclude = 1

grabzItClient.file_to_table("tables.html", options)

json = grabzItClient.save_to()

自订识别码

您可以将自定义标识符传递给 方法,如下所示,然后将该值返回给您的GrabzIt Ruby处理程序。 例如,该自定义标识符可以是数据库标识符,从而允许将屏幕截图与特定数据库记录相关联。

grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.customId = "123456"

grabzItClient.url_to_table("https://www.tesla.com", options)
# Then call the save method
grabzItClient.save("http://www.example.com/handler/index")
grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.customId = "123456"

grabzItClient.html_to_table("<html><body><h1>Hello World!</h1></body></html>", options)
# Then call the save method
grabzItClient.save("http://www.example.com/handler/index")
grabzItClient = GrabzIt::Client.new("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzIt::TableOptions.new()
options.customId = "123456"

grabzItClient.file_to_table("example.html", options)
# Then call the save method
grabzItClient.save("http://www.example.com/handler/index")