Foresniffer tutorial: extracting data

today , The tutorial that Xiaobian brings to you is ： How to smell in front ForeSpider Mid extraction data . The main contents include ： How to select a form , How to collect lists / Table data consists of two parts . The details are as follows ：

One , How to select a form

stay ForeSpider In reptile , Forms are reusable table structures , The created form can be used repeatedly for multiple tasks .

Data table selection page

1. Select the form

Method 1 ： Through the drop-down menu , Or fill out the form ID, Select an existing form . Method 2 ： Build a watch quickly , Click Create Form , Enter the quick table creation page , New form .（>> For details, see quick table creation ） Method 3 ： Free to build a watch , Click on “ Collection configuration ”-“ Data table ”, Click to pick “ Collect forms ” hinder .（>> For details, please refer to free table creation ）

Data table creation page

2. Data storage mode

It refers to data collection , Storage in the database . ① Insert ： Default is insert . If you encounter duplicate data that already exists in the database , No longer insert . ② Update only ： If you encounter duplicate data that already exists in the database , Then the newly collected data will be used to cover . ③ Additional ： For example, the attribute of a field is an operation field , You can perform field operations . ④ Insert and update ： If there is no duplicate record, insert , If there is a duplicate record, it will be updated .

Two , How to collect lists / Tabular data

The identification list is used to store tables / List of data , Put the form / Different columns of the list are stored in different fields , form / Different rows of the list are stored as multiple records of the data table . I used to sniff the official website Web The server （http://www.forenose.com/panne…） For example .

1. create form

According to the table , Create a form that stores table data . On the tab “ Data table ” in , Create a form .（>> Free to build a watch ）

Identify the table structure of the list

（1） Primary key When collecting tables , A row of the table is used as a piece of data . Because the whole table belongs to the same web document , The document has only one primary key , So it can't be like collecting other content , Select the value type “ Page primary key ”. The variable type of the table's primary key , According to the number of rows and length of the table , choice “Integer” perhaps “Long”. Select the value type “ empty ”. Field attribute selection “ Primary key field ” and “ Automatic fields ”（ Select the primary key field , The software will automatically select “ Key value unique ” and “ Index field ”.）

Configuration of primary key fields

（2） Other fields Select the variable type of other fields “string”, Select the value type “ All text in the constituency ”.（>> Field parameters ）

Configuration of other fields

2. Create data extraction

Select a form for data extraction

Select the form

3. Identify multiple values

Click on “ Default data extraction ” node , Press Ctrl Click on any cell , Press Shift Click again to expand the area .

Positioning tables

Click on “ Identify multiple values ”, The selection is expanded to the whole table . Click on “ Confirm the constituency ”.

Confirm multi value

4. Field value

The primary key field does not need to be configured . The fields storing the contents of the table need to take values one by one .（ Method 1 ： Standard positioning / Method 2 ： Feature location ） Click on the data extraction field , Configure the data of different columns of the table one by one . Click on the corresponding field , Press Ctrl Click any cell in the first column , Click on “ preservation ”.

Multi value field values

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