捕获和转换Web的工具

使用Perl从网站捕获HTML表Perl API

使用以下示例说明如何转换HTML表 into使用JSON,CSV和Excel电子表格 GrabzIt的Perl API。 但是,在开始之前,请记住 URLToTable, HTMLToTable or 文件到表格 方法 Save or SaveTo 方法必须检索表捕获。 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

以下代码示例自动转换在指定网页中发现的第一个HTML表 intoa CSV文件。

$grabzIt->URLToTable("https://www.tesla.com");
# Then call the Save or SaveTo method
$grabzIt->HTMLToTable("<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 SaveTo method
$grabzIt->FileToTable("tables.html");
# Then call the Save or SaveTo method

默认情况下,它将转换它标识的第一个表 intoa表。 但是,可以通过将2传递给网页中的第二个表来进行转换 tableNumberToInclude 方法。

$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->tableNumberToInclude(2);

$grabzIt->URLToTable("https://www.tesla.com", $options);
# Then call the Save or SaveTo method
$grabzIt->SaveTo("result.csv");
$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->tableNumberToInclude(2);

$grabzIt->HTMLToTable("<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 SaveTo method
$grabzIt->SaveTo("result.csv");
$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->tableNumberToInclude(2);

$grabzIt->FileToTable("tables.html", $options);
# Then call the Save or SaveTo method
$grabzIt->SaveTo("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。

$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->targetElement("stocks_table");

$grabzIt->URLToTable("https://www.tesla.com", $options);
# Then call the Save or SaveTo method
$grabzIt->SaveTo("result.csv");
$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->targetElement("stocks_table");

$grabzIt->HTMLToTable("<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 SaveTo method
$grabzIt->SaveTo("result.csv");
$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->targetElement("stocks_table");

$grabzIt->FileToTable("tables.html", $options);
# Then call the Save or SaveTo method
$grabzIt->SaveTo("result.csv");

另外,您也可以通过将true传递给 includeAllTables 方法,但这仅适用于XLSX格式。 此选项会将每个表放在生成的电子表格工作簿中的新表中。

$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->format('xlsx');
$options->includeAllTables(1);

$grabzIt->URLToTable("https://www.tesla.com", $options);
# Then call the Save or SaveTo method
$grabzIt->SaveTo("result.xlsx");
$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->format('xlsx');
$options->includeAllTables(1);

$grabzIt->HTMLToTable("<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 SaveTo method
$grabzIt->SaveTo("result.xlsx");
$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->format('xlsx');
$options->includeAllTables(1);

$grabzIt->FileToTable("tables.html", $options);
# Then call the Save or SaveTo method
$grabzIt->SaveTo("result.xlsx");

将HTML表转换为JSON

使用Perl和GrabzIt,您可以转换找到的HTML表 into JSON。 首先,请指定 json 在format参数中。 在示例中,我们正在 同步通话 通过使用 SaveTo 方法,该方法返回JSON string,然后可以通过类似的库进行解析 JSON ::解析.

$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->format("json");
$options->tableNumberToInclude(1);

$grabzIt->URLToTable("https://www.tesla.com", $options);

$json = $grabzIt->SaveTo();
$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->format("json");
$options->tableNumberToInclude(1);

$grabzIt->HTMLToTable("<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 = $grabzIt->SaveTo();
$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->format("json");
$options->tableNumberToInclude(1);

$grabzIt->FileToTable("tables.html", $options);

$json = $grabzIt->SaveTo();

自订识别码

您可以将自定义标识符传递给 方法,如下所示,然后将该值返回到您的GrabzIt Perl处理程序。 例如,此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的数据库记录相关联。

$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->customId("123456");

$grabzIt->URLToTable("https://www.tesla.com", $options);
# Then call the Save method
$grabzIt->Save("http://www.example.com/handler.pl");
$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->customId("123456");

$grabzIt->HTMLToTable("<html><body><h1>Hello World!</h1></body></html>", $options);
# Then call the Save method
$grabzIt->Save("http://www.example.com/handler.pl");
$grabzIt = GrabzItClient->new("Sign in to view your Application Key", "Sign in to view your Application Secret");

$options = GrabzItTableOptions->new();
$options->customId("123456");

$grabzIt->FileToTable("example.html", $options);
# Then call the Save method
$grabzIt->Save("http://www.example.com/handler.pl");