当我使用Scrapy时，如何发送POST请求正文中某些行的副本？

pip install scrapy

# myspider.py
import scrapy

class MySpider(scrapy.Spider):
    name = 'myspider'
    start_urls = ['http://example.com']  # 替换为目标URL

    def start_requests(self):
        # 定义要发送的数据
        data = {
            'key1': 'value1',
            'key2': 'value2',
            # 添加更多键值对
        }
        # 发送POST请求
        yield scrapy.Request(
            url='http://target.com/post',  # 替换为实际的POST请求URL
            method='POST',
            body=data,
            headers={'Content-Type': 'application/json'},  # 根据实际情况设置Content-Type
            callback=self.parse
        )

    def parse(self, response):
        # 处理响应
        self.log('Response received: %s' % response.text)

# myspider.py
import scrapy

class MySpider(scrapy.Spider):
    name = 'myspider'
    start_urls = ['http://example.com']  # 替换为目标URL

    def start_requests(self):
        # 读取文件中的行
        with open('lines.txt', 'r') as file:
            lines = file.readlines()
        
        # 假设我们想要复制第2行和第4行（索引为1和3）
        copied_lines = [lines[1], lines[3]]
        
        # 构造请求体
        data = {
            'copied_lines': copied_lines
        }
        
        # 发送POST请求
        yield scrapy.Request(
            url='http://target.com/post',  # 替换为实际的POST请求URL
            method='POST',
            body=data,
            headers={'Content-Type': 'application/json'},  # 根据实际情况设置Content-Type
            callback=self.parse
        )

    def parse(self, response):
        # 处理响应
        self.log('Response received: %s' % response.text)