一、此爬虫引擎利用HttpClient实现,支持http与https,支持自定义UserAgent,自定义Header,支持Proxy,支持HTML抓取,也支持图片抓取。此框架分三个部分:WebClient,Webquest以及ResponseResult,其中WebClient为引擎最核心部分,实现了资源下载,而Webquest为请求部分,自定义UserAgent,自定义Header,设置Proxy全部是针对Webquest,ResponseResult为响应部分,包括响应头,响应流,以及响应cookie等。二、html抓取测试[C#] 纯文本查看 复制代码 / 网页抓取测试
private static void testHTMLSeek(){
String token = "";
try {
String status = "";
do {
// 通过appkey 和 seckey 获取token
String appkey = "youappkey";
String seckey = "youseckey";
WebRequest wb = new WebRequest();
//wb.setProxy("122.4.45.43:3937"); // 设置代{过}{滤}理
wb.setMethod("GET");
wb.setUserAgent("Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36");
wb.setUrl("https://api.qianzhan.com/OpenPlatformService/GetToken?type=JSON&appkey=" + appkey + "&seckey="
+ seckey);
ResponseResult sr = WebClient.download(wb);
String tokenJson = sr.getResponseHtmlStr();
token = ParseJson(ParseJson(tokenJson, "result"), "token");
System.out.println("token:" + token);
// 测试【多条件联合搜索】这个接口
JSONObject json = new JSONObject();
json.put("token", token);
json.put("type", "JSON");
json.put("companyName","腾讯");
json.put("areaCode", "");
json.put("faRen", "");
json.put("bussinessDes", "");
json.put("address", "");
json.put("gd", "");
json.put("page", "1");
json.put("pagesize", "10");
wb.setMethod("POST");
wb.setUrl("https://api.qianzhan.com/OpenPlatformService/CombineIndexSearch");
wb.setForm(json.toString());
wb.setContentType("application/json");
sr = WebClient.download(wb);
String result = sr.getResponseHtmlStr();
System.out.println(result);
status = ParseJson(result, "status");
} while (status == "101" || status == "102");
} catch (Exception e1) {
e1.printStackTrace();
}
}
三、图片下载测试[C#] 纯文本查看 复制代码 // 图片抓取测试
private static void testImageSeek(){
WebRequest req = new WebRequest();
req.setUrl("https://img3.qianzhan.com/news/201803/30/20180330-40fe3e684227ed76_250x150.jpg");
req.setMethod("GET");
ResponseResult rsp = WebClient.download(req);
byte[] imageBytes = rsp.getResponseContent();
try {
String fileName = "测试图片.png";
String userprofile = System.getenv().get("USERPROFILE");
File file = new File(userprofile + "\\Desktop\\" + fileName);
FileOutputStream fops = new FileOutputStream(file);
fops.write(imageBytes);
fops.flush();
fops.close();
System.out.println("图片已经写入到" + file.getAbsolutePath());
} catch (Exception e) {
e.printStackTrace();
}
}
四、引擎源码下载地址
https://pan.baidu.com/s/1sji6UOhyvOLNv345Vn9EdA?_at_=1679458752261
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