【背景】
之前写了个C#程序，从Amazon中抓取数据。
此版本是完全从网页中抓取产品信息的。
【ScrapeAmazonProduct代码分享】
1.截图：
2.完整项目代码下载：
ScrapeAmazonProduct_2013-06-11_scrapeFromHtml.zip
3.代码分享：
（1）frmScrapeAmazonProduct.cs
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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 | /* * [File] * frmScrapeAmazonProduct.cs * * [Function] * Scrape products data from Amazon * * [Author] * Crifan Li * * [Date] * 2013-06-11 * * [Contact] */using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Web;using System.Net;using System.Xml;using System.IO;using HtmlAgilityPack;using System.Text.RegularExpressions;using Excel = Microsoft.Office.Interop.Excel;using Microsoft.Office.Interop.Excel;using NLog;using NLog.Targets;using NLog.Config;namespace ScrapeAmazonProduct{ public partial class frmScrapeAmazonProduct : Form { struct AmazonProductInfo { public string url; //record who it is public string title; public string description; //5 bullet public string[] bulletArr; // total 5 (or more, but only record 5) //download 5 pics public string[] imgFullnameArr; // total 5 (or more, but only record 5) //product keyword fileds, up to 3 public string[] keywordFieldArr; //each field, less than 50 chars, seperated by ',' //highest price of total (up to 8) sellers public float highestPrice; public bool isOneSellerIsAmazon; public int reviewNumber; public bool isBestSeller; }; //for debug private int lineNumber = 1; string outputExcelFilename = "AmazonProductInfo.xls"; string constOutputFolderName = "output"; string outputExcelFullFilename = ""; string absOutputFolder = ""; string gLogFilename; public static int rule_minimalBuyerNumber = 8; public static int rule_totalUnitNumber = 50; //check max length for each bullet < 100 (or 90?) public static int rule_maxLenEachBullet = 100; public static float rule_dimensionMaxLengthCm = 80.0F; public static float rule_dimensionMaxWidthCm = 80.0F; public static float rule_dimensionMaxHeightCm = 80.0F; public static int rule_maxSingleKeywordFieldLen = 50; Dictionary<string, string> gMainCatMappingBestSellerCatDict; public crifanLib crl; public crifanLibAmazon amazonLib; List<crifanLibAmazon.categoryItem> mainCategoryList; List<crifanLibAmazon.categoryItem> bestSellerCategoryList; //for log public Logger gLogger = null; public frmScrapeAmazonProduct() { //!!! for load embedded dll: (1) register resovle handler AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve); crl = new crifanLib(); amazonLib = new crifanLibAmazon(); gMainCatMappingBestSellerCatDict = null; InitializeComponent(); } //!!! for load embedded dll: (2) implement this handler System.Reflection.Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args) { string dllName = args.Name.Contains(",") ? args.Name.Substring(0, args.Name.IndexOf(',')) : args.Name.Replace(".dll", ""); dllName = dllName.Replace(".", "_"); if (dllName.EndsWith("_resources")) return null; System.Resources.ResourceManager rm = new System.Resources.ResourceManager(GetType().Namespace + ".Properties.Resources", System.Reflection.Assembly.GetExecutingAssembly()); byte[] bytes = (byte[])rm.GetObject(dllName); return System.Reflection.Assembly.Load(bytes); } private void initSearchCategory() { mainCategoryList = amazonLib.extractMainCategoryList(regularCategoryMainUrl); if ((mainCategoryList != null) && (mainCategoryList.Count > 0)) { //init search category cmbSearchCategory.DataSource = mainCategoryList; cmbSearchCategory.DisplayMember = "name"; } else { gLogger.Fatal("can not find main category list"); } //string bestSellerMainUrl = "http://www.amazon.com/Best-Sellers/zgbs/ref=zg_bs_tab"; bestSellerCategoryList = amazonLib.extractBestSellerCategoryList(bestSellerMainUrl); //gLogger.Trace("=== Main Category Info ==="); //for (int idx = 0; idx < mainCategoryList.Count; idx++) //{ // crifanLibAmazon.categoryItem catItem = mainCategoryList[idx]; // int num = idx + 1; // gLogger.Trace(num.ToString()); // gLogger.Trace("Name:\t" + catItem.Name); // gLogger.Trace("Key:\t" + catItem.Key); // gLogger.Trace("Url:\t" + catItem.Url); //} //gLogger.Trace("=== Best Seller Category Info ==="); //for (int idx = 0; idx < bestSellerCategoryList.Count; idx++) //{ // crifanLibAmazon.categoryItem catItem = bestSellerCategoryList[idx]; // int num = idx + 1; // gLogger.Trace(num.ToString()); // gLogger.Trace("Name:\t" + catItem.Name); // gLogger.Trace("Key:\t" + catItem.Key); // gLogger.Trace("Url:\t" + catItem.Url); //} } private void initMainCategoryToBestSellerCategoryMapping() { gMainCatMappingBestSellerCatDict = new Dictionary<string, string>(); //gmainCatMappingBestSellerCatDict.Add("instant-video", ""); gMainCatMappingBestSellerCatDict.Add("appliances", "appliances"); gMainCatMappingBestSellerCatDict.Add("mobile-apps", "mobile"); gMainCatMappingBestSellerCatDict.Add("arts-crafts", "arts"); gMainCatMappingBestSellerCatDict.Add("automotive", "automotive"); gMainCatMappingBestSellerCatDict.Add("baby-products", "baby"); gMainCatMappingBestSellerCatDict.Add("beauty", "beauty"); gMainCatMappingBestSellerCatDict.Add("stripbooks", "books"); //gmainCatMappingBestSellerCatDict.Add("", "photo"); gMainCatMappingBestSellerCatDict.Add("mobile", "wireless"); gMainCatMappingBestSellerCatDict.Add("apparel", "apparel"); //gmainCatMappingBestSellerCatDict.Add("collectibles", ""); gMainCatMappingBestSellerCatDict.Add("computers", "pc"); //gmainCatMappingBestSellerCatDict.Add("financial", ""); gMainCatMappingBestSellerCatDict.Add("electronics", "electronics"); gMainCatMappingBestSellerCatDict.Add("gift-cards", "gift"); gMainCatMappingBestSellerCatDict.Add("grocery", "grocery"); gMainCatMappingBestSellerCatDict.Add("hpc", "hpc"); gMainCatMappingBestSellerCatDict.Add("garden", "home"); //gmainCatMappingBestSellerCatDict.Add("", "hi"); gMainCatMappingBestSellerCatDict.Add("industrial", "industrial"); gMainCatMappingBestSellerCatDict.Add("jewelry", "jewelry"); gMainCatMappingBestSellerCatDict.Add("digital-text", "digital"); //gmainCatMappingBestSellerCatDict.Add("", "kitchen"); //gmainCatMappingBestSellerCatDict.Add("", "dmusic"); gMainCatMappingBestSellerCatDict.Add("magazines", "magazines"); gMainCatMappingBestSellerCatDict.Add("movies-tv", "movies"); gMainCatMappingBestSellerCatDict.Add("digital-music", "dmusic");//MP3 Music gMainCatMappingBestSellerCatDict.Add("popular", "music"); //Music gMainCatMappingBestSellerCatDict.Add("mi", "musical"); //Musical Instruments gMainCatMappingBestSellerCatDict.Add("office-products", "office"); gMainCatMappingBestSellerCatDict.Add("lawngarden", "lawn"); gMainCatMappingBestSellerCatDict.Add("pets", "pet"); gMainCatMappingBestSellerCatDict.Add("shoes", "shoes"); gMainCatMappingBestSellerCatDict.Add("software", "software"); gMainCatMappingBestSellerCatDict.Add("sporting", "sporting"); gMainCatMappingBestSellerCatDict.Add("tools", "hi"); //Tools & Home Improvement -> Home Improvement gMainCatMappingBestSellerCatDict.Add("toys-and-games", "toys"); gMainCatMappingBestSellerCatDict.Add("videogames", "videogames"); gMainCatMappingBestSellerCatDict.Add("watches", "watches"); } private void initLogger() { //logger = LogManager.GetCurrentClassLogger(); // Step 1. Create configuration object LoggingConfiguration logConfig = new LoggingConfiguration(); // Step 2. Create targets and add them to the configuration RichTextBoxTarget rtbTarget = new RichTextBoxTarget(); logConfig.AddTarget("richTextBox", rtbTarget); rtbTarget.FormName = "frmScrapeAmazonProduct"; // your winform class name rtbTarget.ControlName = "rtbLog"; // your RichTextBox control/variable name FileTarget fileTarget = new FileTarget(); logConfig.AddTarget("logFile", fileTarget); // Step 3. Set target properties //string commonLayout = "${date:format=yyyy-MM-dd HH\\:mm\\:ss} ${logger} ${message}"; //string commonLayout = "[${date:format=yyyy-MM-dd HH\\:mm\\:ss}][${level}] ${message}"; string commonLayout = "[${date:format=yyyy-MM-dd HH\\:mm\\:ss}][${pad:padding=5:inner=${level:uppercase=true}}] ${message}"; rtbTarget.Layout = commonLayout; //fileTarget.FileName = "${basedir}/output/log.txt"; //{'${basedir}/output/log.txt'} fileTarget.FileName = gLogFilename; //{'D:\tmp\tmp_dev_root\freelance\elance\40939187_scrape_amazon\40939187_scrape_amazon\ScrapeAmazonProduct\ScrapeAmazonProduct\bin\Debug\output\2013-06-11_153647_log.txt'} fileTarget.Layout = commonLayout; // Step 4. Define rules LoggingRule ruleRichTextBox = new LoggingRule("*", LogLevel.Info, rtbTarget); logConfig.LoggingRules.Add(ruleRichTextBox); LoggingRule ruleFile = new LoggingRule("*", LogLevel.Trace, fileTarget); logConfig.LoggingRules.Add(ruleFile); // Step 5. Activate the configuration LogManager.Configuration = logConfig; // Example usage //Logger logger = LogManager.GetLogger("Amazon"); //Logger logger = LogManager.GetLogger(""); gLogger = LogManager.GetLogger(""); //gLogger.Trace("trace log message"); //gLogger.Debug("debug log message"); //gLogger.Info("info log message"); //gLogger.Warn("warn log message"); //gLogger.Error("error log message"); //gLogger.Fatal("fatal log message"); } private void frmScrapeAmazonProduct_Load(object sender, EventArgs e) { //1. init output directory absOutputFolder = Path.Combine(Environment.CurrentDirectory, constOutputFolderName); if (!Directory.Exists(absOutputFolder)) { Directory.CreateDirectory(absOutputFolder); } outputExcelFullFilename = Path.Combine(absOutputFolder, outputExcelFilename); //2. init log filename //string curDatetimeStr = DateTime.Now.ToString(); DateTime curDateTime = DateTime.Now; string curDatetimeStr = String.Format("{0:yyyy-MM-dd_HHmmss}", curDateTime); //"2013-06-11_142102" gLogFilename = curDatetimeStr + "_log.txt"; //"2013-06-11_153647_log.txt" gLogFilename = Path.Combine(absOutputFolder, gLogFilename); //{'D:\tmp\tmp_dev_root\freelance\elance\40939187_scrape_amazon\40939187_scrape_amazon\ScrapeAmazonProduct\ScrapeAmazonProduct\bin\Debug\output\2013-06-11_153647_log.txt'} //3. init logger initLogger(); //4. init main category list to best seller mapping initMainCategoryToBestSellerCategoryMapping(); //5. init main category list initSearchCategory(); } //private void print(string info) //{ // rtbLog.Text = rtbLog.Text + info + Environment.NewLine; // System.Windows.Forms.Application.DoEvents(); //} //private void log(string info) //{ // rtbLog.Text = "[" + lineNumber.ToString() + "]" // + info // + Environment.NewLine // + rtbLog.Text; // lineNumber++; // System.Windows.Forms.Application.DoEvents(); //} private bool checkBuyerNumber(string productHtml, out string invalidReason, out string usedAndNewUrl) { bool isBuyerNumberValid = false; invalidReason = "Unknow error for checkBuyerNumber"; usedAndNewUrl = ""; int buyerNumber = 0; if (amazonLib.extractProductBuyerNumberAndNewUrl(productHtml, out buyerNumber, out usedAndNewUrl)) { if (buyerNumber > rule_minimalBuyerNumber) { isBuyerNumberValid = true; invalidReason = ""; } else { isBuyerNumberValid = false; invalidReason = String.Format("Buyer Number is {0}, less than {1}", buyerNumber, rule_minimalBuyerNumber); } } else { isBuyerNumberValid = false; invalidReason = "Not found buyer number string and used and new url"; } return isBuyerNumberValid; } private bool checkTotalUnitNumber(string productUrl, out string invalidReason) { //debug //productUrl = "http://www.amazon.com/gp/offer-listing/B0083PWAPW/ref=dp_olp_all_mbc?ie=UTF8&condition=all"; //productUrl = "http://www.amazon.com/gp/offer-listing/B007HUUU6A/ref=dp_olp_new_mbc?ie=UTF8&condition=new"; bool isTotal50UnitNum = false; invalidReason = "Unknow error for checkTotalUnitNumber"; HtmlAgilityPack.HtmlDocument htmlDoc = null; int totalNumber = 0; //string respHtml = crl.getUrlRespHtml(productUrl); string respHtml = crl.getUrlRespHtml_multiTry(productUrl); /* <form method="POST" action="/gp/item-dispatch/ref=olp_atc_used_1" > <input type="hidden" name="session-id" value="178-3505985-4680803"> <input type="hidden" name="qid" value=""> <input type="hidden" name="sr" value=""> <input id="signInToHUC" type="hidden" value="0" name="signInToHUC"> <input type="hidden" name="metric-asin.1616550414" value="1"> <input type="hidden" name="registryItemID.1" value=""> <input type="hidden" name="registryID.1" value=""> <input type="hidden" name="itemCount" value="1"> <input type="hidden" name="offeringID.1" value="n5Z1VzKW%2FMw90LVK2m6qQO9cxMOctYK3JMq7ea8RaqXkBZUh4WAfxc0emP1KFayuYhqKmk7KlUt9mqIcvgBck9UP4MtWJC1ZvH527IITG0IwujyCrGlxnA6WVgb02eM2avyXLkUpdRFYiUvksTQTqT87qNDk6mMo"> <input type="hidden" name="isAddon" value="0"> <input type="image" src="http://g-ecx.images-amazon.com/images/G/01/x-locale/nav2/images/add-to-cart-md-p._V192250398_.gif" align="absmiddle" alt="Add to cart" border="0" height="21" name="submit.addToCart" width="112"/> </form> */ htmlDoc = crl.htmlToHtmlDoc(respHtml); HtmlNodeCollection postItemNodeList = htmlDoc.DocumentNode.SelectNodes("//form[starts-with(@action, '/gp/item-dispatch/ref=') and @method='POST']"); if (postItemNodeList == null) { //something error invalidReason = "Can not found /gp/item-dispatch post item"; } else { foreach (HtmlNode postItemNode in postItemNodeList) { string itemDispatchUrl = postItemNode.Attributes["action"].Value; ///gp/item-dispatch/ref=olp_atc_used_1 itemDispatchUrl = constAmazonDomainUrl + itemDispatchUrl;//http://www.amazon.com/gp/item-dispatch/ref=olp_atc_used_1 Dictionary<string, string> postDict = new Dictionary<string, string>(); HtmlNodeCollection inputTypeNodeList = postItemNode.SelectNodes(".//input[@type='hidden' and @name and @value]"); //HtmlNodeCollection inputTypeNodeList = postItemNode.SelectNodes(".//input[@type and @name and @value]"); if (inputTypeNodeList == null) { //something error invalidReason = String.Format("Can not find input tag for node: {1}", postItemNode.InnerHtml); break; } else { foreach (HtmlNode inputTypeNode in inputTypeNodeList) { //get each post key and value string postKey = inputTypeNode.Attributes["name"].Value; string postValue = inputTypeNode.Attributes["value"].Value; postDict.Add(postKey, postValue); /* session-id=178-3505985-4680803 &qid= &sr= &signInToHUC=0 &metric-asin.1616550414=1 ®istryItemID.1= ®istryID.1= &itemCount=1 &offeringID.1=n5Z1VzKW%252FMw90LVK2m6qQO9cxMOctYK3JMq7ea8RaqXkBZUh4WAfxc0emP1KFayuYhqKmk7KlUt9mqIcvgBck9UP4MtWJC1ZvH527IITG0IwujyCrGlxnA6WVgb02eM2avyXLkUpdRFYiUvksTQTqT87qNDk6mMo &isAddon=0 &submit.addToCart.x=63 &submit.addToCart.y=7 */ } postDict.Add("submit.addToCart.x", "63"); postDict.Add("submit.addToCart.y", "7"); Dictionary<string, string> headerDict = new Dictionary<string, string>(); headerDict.Add("AllowAutoRedirect", "false"); headerDict.Add("Referer", productUrl); //do POST //no autoredirect HttpWebResponse resp = crl.getUrlResponse(itemDispatchUrl, headerDict, postDict); string viewHtmlUrl = resp.Headers["Location"]; if (viewHtmlUrl != null && viewHtmlUrl != "") { //respHtml = crl.getUrlRespHtml(viewHtmlUrl); respHtml = crl.getUrlRespHtml_multiTry(viewHtmlUrl); //got html: //<div class="hlb-scarcity red">Only 8 left in stock.</div> htmlDoc = crl.htmlToHtmlDoc(respHtml); HtmlNode hlbScarcityNode = htmlDoc.DocumentNode.SelectSingleNode("//div[starts-with(@class, 'hlb-scarcity')]"); if (hlbScarcityNode == null) { //first one is amazon, no hlb-scarcity red //others must have this } else { string leftInStockStr = hlbScarcityNode.InnerText; //Only 1 left in stock. string leftNumberStr = ""; if (crl.extractSingleStr(@"Only (\d+) left in stock", leftInStockStr, out leftNumberStr)) { int leftNumberInt = Int32.Parse(leftNumberStr); //1 totalNumber += leftNumberInt; if (totalNumber > rule_totalUnitNumber) { isTotal50UnitNum = true; invalidReason = "No error"; break; } } else { //something error invalidReason = "Can not find remaining number"; break; } } } else { //something error invalidReason = "Not found viewHtmlUrl"; break; } } } } return isTotal50UnitNum; } private bool checkWeight(string productUrl, string productHtml, out string invalidReason) { bool isLess5Pounds = false; invalidReason = "Unknow error for checkWeight"; float maxKiloGram = 2.5F; float kiloGram = amazonLib.extractProductWeight(productHtml); //check valid or not if (kiloGram > 0.0F) { if (kiloGram <= maxKiloGram) { isLess5Pounds = true; } else { isLess5Pounds = false; invalidReason = String.Format("Weight is {0} kilogram, more than 5 pounds", kiloGram); } } else { isLess5Pounds = false; invalidReason = "Not found weight string or unrecognized weight number"; } return isLess5Pounds; } private bool checkDimension(string productUrl, string productHtml, out string invalidReason) { bool isValidDimension = false; invalidReason = "Unknow error for checkDimension"; crifanLibAmazon.productDimension dimensionCm = amazonLib.extractProductDimension(productHtml); if (dimensionCm.length > 0.0F) { crifanLibAmazon.productDimension dimensionMaxCm = new crifanLibAmazon.productDimension(); dimensionMaxCm.length = rule_dimensionMaxLengthCm; dimensionMaxCm.width = rule_dimensionMaxWidthCm; dimensionMaxCm.height = rule_dimensionMaxHeightCm; //check valid or not if ( (dimensionCm.length <= dimensionMaxCm.length) && (dimensionCm.width <= dimensionMaxCm.width) && (dimensionCm.height <= dimensionMaxCm.height) ) { isValidDimension = true; } else { isValidDimension = false; invalidReason = String.Format("Dimension: {0}cm x {1}cm x {2}cm invalid for exceed max: {3}cm x {4}cm x {5}cm", dimensionCm.length, dimensionCm.width, dimensionCm.height, dimensionMaxCm.length, dimensionMaxCm.width, dimensionMaxCm.height); } } else { //isValidDimension = false; //invalidReason = "Not found dimension string"; isValidDimension = true; // even if no dimension, also consider it as valid one if the weight is valid } return isValidDimension; } private bool checkProductValid(string productUrl, string productHtml, out string invalidReason, out string usedAndNewUrl) { bool isProductValid = true; invalidReason = ""; usedAndNewUrl = ""; //1. check buyer number > 8 if (isProductValid) { //debug isProductValid = checkBuyerNumber(productHtml, out invalidReason, out usedAndNewUrl); } //2. check total unit number > 50 if (isProductValid) { //debug isProductValid = checkTotalUnitNumber(usedAndNewUrl, out invalidReason); } //3. check no more than 5 pounds (2.5 kg) if (isProductValid) { //debug isProductValid = checkWeight(productUrl, productHtml, out invalidReason); } //4. check dimension less than 80cmX80cmX80cm if (isProductValid) { //debug isProductValid = checkDimension(productUrl, productHtml, out invalidReason); } return isProductValid; } public void updateProgress(int percentage) { //pgbDownload.Value = percentage; } public void downloadPictures(string productUrl, string respHtml, out string[] picFullnameList) { picFullnameList = null; //init string productAsin = ""; if (amazonLib.extractAsinFromProductUrl(productUrl, out productAsin)) { } else { //something wrong } //creat folder string downloadRootPath = Path.Combine(absOutputFolder, "download"); string downloadFullPath = Path.Combine(downloadRootPath, productAsin); if (!Directory.Exists(downloadFullPath)) { Directory.CreateDirectory(downloadFullPath); } string[] imageUrlList = amazonLib.extractProductImageList(respHtml); gLogger.Info("Extracted image url list:"); if (imageUrlList != null) { picFullnameList = new string[imageUrlList.Length]; for (int idx = 0; idx < imageUrlList.Length; idx++) { string imageUrl = imageUrlList[idx]; gLogger.Info(String.Format("[{0}]={1}", idx, imageUrl)); string picFilename = crl.extractFilenameFromUrl(imageUrl); string picFullFilename = Path.Combine(downloadFullPath, picFilename); string errorStr = ""; gLogger.Info(String.Format("Downloading {0}] to {1}", imageUrl, picFullFilename)); crl.downloadFile(imageUrl, picFullFilename, out errorStr, updateProgress); //update picFullnameList[idx] = picFullFilename; } } else { gLogger.Error("No image url for " + productUrl); } } /* * productUrl=http://www.amazon.com/Kindle-Paperwhite-Touch-light/dp/B007OZNZG0/ref=lp_1055398_1_1?ie=UTF8&qid=1370510177&sr=1-1 * usedAndNewUrl=http://www.amazon.com/gp/offer-listing/B007OZNZG0/ref=dp_olp_all_mbc?ie=UTF8&condition=all */ private AmazonProductInfo extractProductInfo(string productUrl, string productHtml, string usedAndNewUrl) { gLogger.Info("Extracting info for " + productUrl); //init AmazonProductInfo productInfo = new AmazonProductInfo(); productInfo.url = productUrl; productInfo.highestPrice = 0.0F; productInfo.isOneSellerIsAmazon = false; //must init, otherwise, when only got 4 bullet, here total 5 -> last is null -> assign later will exception productInfo.bulletArr = new string[5]; crl.emptyStringArray(productInfo.bulletArr); productInfo.imgFullnameArr = new string[5]; crl.emptyStringArray(productInfo.imgFullnameArr); productInfo.keywordFieldArr = new string[3]; crl.emptyStringArray(productInfo.keywordFieldArr); //1. title productInfo.title = amazonLib.extractProductTitle(productHtml); gLogger.Info("Title=" + productInfo.title); //2. description and 5 bullet List<string> bulletList = new List<string>(); bool gotBullets = amazonLib.extractProductBulletList(productHtml, out bulletList); gLogger.Info("Extracted Bullets=" + gotBullets); string description = ""; bool gotDescription = amazonLib.extractProductDescription(productHtml, out description); gLogger.Info("Got Description=" + gotDescription); /* * 1. if no description, use bullet * 2. if more than normal 5 bullets, get all bullets, just use first 5 bullets to description * 3. if no bullet, use description to split to 5 bullets */ //type1: has description, has bullet if ((description != "") && (bulletList.Count > 0)) { productInfo.description = description; //bullets //maybe has more than 5 bullets //maybe less than 5 bullets //has feature-bullets_feature_div, but no content -> bulletsNodeList is null for (int idx = 0; idx < bulletList.Count; idx++) { string bulletStr = bulletList[idx]; //get first 5 -> to bullet if (idx < 5) { productInfo.bulletArr[idx] = bulletStr; } } } //type2: no description, has bullet else if ((description == "") && (bulletList.Count > 0)) { //bullets //maybe has more than 5 bullets //maybe less than 5 bullets for (int idx = 0; idx < bulletList.Count; idx++) { string bulletStr = bulletList[idx]; //get first 5 -> to bullet if (idx < 5) { productInfo.bulletArr[idx] = bulletStr; } //all bullet -> description description = description + bulletStr + Environment.NewLine; } productInfo.description = description; } //type3: has description, no bullet else if ((description != "") && (bulletList.Count == 0)) { productInfo.description = description; //seperate description to many lines string[] lines = description.Split('.'); //maybe less than 5, maybe greater than 5 for (int idx = 0; idx < lines.Length; idx++) { string curLine = lines[idx]; //get first 5 -> to bullet if (idx < 5) { productInfo.bulletArr[idx] = curLine; } } } //type4: no description, no bullet else if ((description == "") && (bulletList.Count == 0)) { //something wrong } //check max length for each bullet for (int idx = 0; idx < productInfo.bulletArr.Length; idx++) { if (productInfo.bulletArr[idx].Length > rule_maxLenEachBullet) { productInfo.bulletArr[idx] = productInfo.bulletArr[idx].Substring(0, rule_maxLenEachBullet); } } //check max length for whole description ? //3. download 5(or 7) pics string[] picFullnameList = null; //debug downloadPictures(productUrl, productHtml, out picFullnameList); if((picFullnameList != null) && (picFullnameList.Length > 0)) { int maxImageCount = 0; if(picFullnameList.Length > productInfo.imgFullnameArr.Length) { maxImageCount = productInfo.imgFullnameArr.Length; } else { maxImageCount = picFullnameList.Length; } for (int idx = 0; idx < maxImageCount; idx++) { productInfo.imgFullnameArr[idx] = picFullnameList[idx]; } } //4.extract product seller info: price and name List<crifanLibAmazon.productSellerInfo> allSellerInfoList = new List<crifanLibAmazon.productSellerInfo>(); if (amazonLib.extractAllSellerInfo(usedAndNewUrl, out allSellerInfoList)) { foreach (crifanLibAmazon.productSellerInfo eachSellerInfo in allSellerInfoList) { //(1) calc highest price if (eachSellerInfo.price > productInfo.highestPrice) { productInfo.highestPrice = eachSellerInfo.price; } //(2) find whether one of the sellers is Amazon //here means: one of the seller's name is: Amazon.com if (eachSellerInfo.name.Equals("Amazon.com", StringComparison.CurrentCultureIgnoreCase)) { productInfo.isOneSellerIsAmazon = true; } } } else { gLogger.Debug("not found seller info for " + usedAndNewUrl); } gLogger.Info("Highest Price=" + productInfo.highestPrice); gLogger.Info("One of Seller is Amazon=" + productInfo.isOneSellerIsAmazon); //5. 3 keyword Field productInfo.keywordFieldArr = amazonLib.extractProductKeywordField(productInfo.title, productInfo.keywordFieldArr.Length, rule_maxSingleKeywordFieldLen); gLogger.Info("Keyword Field List:"); if ((productInfo.keywordFieldArr != null) && (productInfo.keywordFieldArr.Length > 0)) { for (int idx = 0; idx < productInfo.keywordFieldArr.Length; idx++) { String keywordField = productInfo.keywordFieldArr[idx]; gLogger.Info(String.Format("[{0}]={1}", idx, keywordField)); } } //6. product review productInfo.reviewNumber = amazonLib.extractProductReviewNumber(productHtml); gLogger.Info("ReviewNumber=" + productInfo.reviewNumber); //7. product best seller rank number list List<crifanLibAmazon.productBestRank> bestSellerRankList = amazonLib.extractProductBestSellerRankList(productHtml); if ((bestSellerRankList != null) && (bestSellerRankList.Count > 0)) { productInfo.isBestSeller = true; } else { gLogger.Debug("bestSellerRankList is null or count not > 0 : " + bestSellerRankList.ToString()); } gLogger.Info("Is BestSeller=" + productInfo.isBestSeller); return productInfo; } private void createOutputFile(string excelFullFilename) { gLogger.Info("Creating ouput file " + excelFullFilename); bool isAutoFit = true; bool isHeaderBold = true; //init //if exist remove it if (File.Exists(excelFullFilename)) { File.Delete(excelFullFilename); } Excel.Application xlApp = new Excel.Application(); Excel.Workbook xlWorkBook; Excel.Worksheet xlWorkSheet; object misValue = System.Reflection.Missing.Value; xlApp = new Excel.ApplicationClass(); xlWorkBook = xlApp.Workbooks.Add(misValue); xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1); const int excelRowHeader = 1; const int excelColumnHeader = 1; //save header int curColumnIdx = 0 + excelColumnHeader; int rowIdx = 0 + excelRowHeader; xlWorkSheet.Cells[rowIdx, curColumnIdx++] = "Title"; xlWorkSheet.Cells[rowIdx, curColumnIdx++] = "Description"; const int constBullerLen = 5; for (int bulletIdx = 0; bulletIdx < constBullerLen; bulletIdx++) { int bulletNum = bulletIdx + 1; xlWorkSheet.Cells[rowIdx, curColumnIdx + bulletIdx] = "Bullet" + bulletNum.ToString(); } curColumnIdx = curColumnIdx + constBullerLen; const int constImgNameListLen = 5; for (int imgIdx = 0; imgIdx < constImgNameListLen; imgIdx++) { int imgNum = imgIdx + 1; xlWorkSheet.Cells[rowIdx, curColumnIdx + imgIdx] = "ImageFilename" + imgNum.ToString(); } curColumnIdx = curColumnIdx + constImgNameListLen; xlWorkSheet.Cells[rowIdx, curColumnIdx++] = "HighestPrice"; xlWorkSheet.Cells[rowIdx, curColumnIdx++] = "OneSellerIsAmazon"; xlWorkSheet.Cells[rowIdx, curColumnIdx++] = "ReviewNumber"; xlWorkSheet.Cells[rowIdx, curColumnIdx++] = "IsBestSeller"; //formatting //(1) header to bold if (isHeaderBold) { Range headerRow = xlWorkSheet.get_Range("1:1", System.Type.Missing); headerRow.Font.Bold = true; } //(2) auto adjust column width (according to content) if (isAutoFit) { Range allColumn = xlWorkSheet.Columns; allColumn.AutoFit(); } //output xlWorkBook.SaveAs(excelFullFilename, XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, XlSaveAsAccessMode.xlExclusive, XlSaveConflictResolution.xlLocalSessionChanges, misValue, misValue, misValue, misValue); xlWorkBook.Close(true, misValue, misValue); xlApp.Quit(); crl.releaseObject(xlWorkSheet); crl.releaseObject(xlWorkBook); crl.releaseObject(xlApp); } private void appendInfoToFile(string fullFilename, AmazonProductInfo productInfo) { gLogger.Info("Saving product info for " + productInfo.url); Excel.Application xlApp; Excel.Workbook xlWorkBook; Excel.Worksheet xlWorkSheet; object missingVal = System.Reflection.Missing.Value; xlApp = new Microsoft.Office.Interop.Excel.Application(); //xlApp.Visible = true; //xlApp.DisplayAlerts = false; xlWorkBook = xlApp.Workbooks.Open( Filename : fullFilename, //UpdateLinks:3, ReadOnly : false, //Format : 2, //use Commas as delimiter when open text file //Password : missingVal, //WriteResPassword : missingVal, //IgnoreReadOnlyRecommended: false, //when save to readonly, will notice you Origin: Excel.XlPlatform.xlWindows, //xlMacintosh/xlWindows/xlMSDOS //Delimiter: ",", // usefule when is text file Editable : true, Notify : false, //Converter: missingVal, AddToMru: true, //True to add this workbook to the list of recently used files Local: true, CorruptLoad: missingVal //xlNormalLoad/xlRepairFile/xlExtractData ); //Get the first sheet xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1); //also can get by sheet name Excel.Range range = xlWorkSheet.UsedRange; //int usedColCount = range.Columns.Count; int usedRowCount = range.Rows.Count; const int excelRowHeader = 1; const int excelColumnHeader = 1; //int curColumnIdx = usedColCount + excelColumnHeader; int curColumnIdx = 0 + excelColumnHeader; //start from column begin int curRrowIdx = usedRowCount + excelRowHeader; // !!! here must added buildin excelRowHeader=1, otherwise will overwrite previous (added title or whole row value) xlWorkSheet.Cells[curRrowIdx, curColumnIdx++] = productInfo.title; xlWorkSheet.Cells[curRrowIdx, curColumnIdx++] = productInfo.description; const int constBullerLen = 5; int bulletListLen = 0; if (productInfo.bulletArr.Length > constBullerLen) { bulletListLen = constBullerLen; } else { bulletListLen = productInfo.bulletArr.Length; } for (int bulletIdx = 0; bulletIdx < bulletListLen; bulletIdx++) { xlWorkSheet.Cells[curRrowIdx, curColumnIdx + bulletIdx] = productInfo.bulletArr[bulletIdx]; } curColumnIdx = curColumnIdx + bulletListLen; const int constImgNameListLen = 5; int imgNameListLen = 0; if (productInfo.imgFullnameArr.Length > constImgNameListLen) { imgNameListLen = constImgNameListLen; } else { imgNameListLen = productInfo.imgFullnameArr.Length; } for (int imgIdx = 0; imgIdx < imgNameListLen; imgIdx++) { xlWorkSheet.Cells[curRrowIdx, curColumnIdx + imgIdx] = productInfo.imgFullnameArr[imgIdx]; } curColumnIdx = curColumnIdx + imgNameListLen; xlWorkSheet.Cells[curRrowIdx, curColumnIdx++] = productInfo.highestPrice; xlWorkSheet.Cells[curRrowIdx, curColumnIdx++] = productInfo.isOneSellerIsAmazon; xlWorkSheet.Cells[curRrowIdx, curColumnIdx++] = productInfo.reviewNumber; xlWorkSheet.Cells[curRrowIdx, curColumnIdx++] = productInfo.isBestSeller; //xlWorkBook.SaveAs( // Filename: fullFilename, // ConflictResolution: XlSaveConflictResolution.xlLocalSessionChanges //The local user's changes are always accepted. // //FileFormat : Excel.XlFileFormat.xlWorkbookNormal //); //if use above SaveAs -> will popup a window ask you overwrite it or not, even if you have set the ConflictResolution to xlLocalSessionChanges, which should not ask, should directly save xlWorkBook.Save(); xlWorkBook.Close(SaveChanges : true); crl.releaseObject(xlWorkSheet); crl.releaseObject(xlWorkBook); crl.releaseObject(xlApp); } //save product info private void saveProductInfo(AmazonProductInfo productInfo) { //check if output excel file already exist if (!File.Exists(outputExcelFullFilename)) { //if no, create it, add header createOutputFile(outputExcelFullFilename); } //then append info to it appendInfoToFile(outputExcelFullFilename, productInfo); return; } //check whether each product valid or not //if valid, extract product info private void checkAndExtractForSingleProduct(string productUrl) { //debug //productUrl = "http://www.amazon.com/Paderno-World-Cuisine-A4982799-Tri-Blade/dp/B0007Y9WHQ/ref=lp_1055398_1_3?ie=UTF8&qid=1370596558&sr=1-3"; bool isProductValid = false; string invalidReason = ""; //string respHtml = crl.getUrlRespHtml(productUrl); string productHtml = crl.getUrlRespHtml_multiTry(productUrl); string usedAndNewUrl = ""; isProductValid = checkProductValid(productUrl, productHtml, out invalidReason, out usedAndNewUrl); if (isProductValid) { gLogger.Info("+VALID+ Product=" + productUrl); AmazonProductInfo productInfo = extractProductInfo(productUrl, productHtml, usedAndNewUrl); saveProductInfo(productInfo); } else { gLogger.Info(String.Format("-INVALID- product={0}, reason={1}", productUrl, invalidReason)); } } //check whether each product variation valid or not //if valid, extract product info private void checkAndExtractForSingleVariation(crifanLibAmazon.variationItem singleVariationItem) { bool isProductValid = false; string invalidReason = ""; gLogger.Info("processing variation " + singleVariationItem.url); //string respHtml = crl.getUrlRespHtml(singleVariationItem.url); string productHtml = crl.getUrlRespHtml_multiTry(singleVariationItem.url); string usedAndNewUrl = ""; isProductValid = checkProductValid(singleVariationItem.url, productHtml, out invalidReason, out usedAndNewUrl); if (isProductValid) { gLogger.Info("Valid product=" + singleVariationItem.url); AmazonProductInfo productInfo = extractProductInfo(singleVariationItem.url, productHtml, usedAndNewUrl); //check whether the product title already have vartiation label in the end of title //if not, added it if (productInfo.title.EndsWith(singleVariationItem.label)) { //title already added variation label: //GE MWF Refrigerator Water Filter, 1-Pack //also for: //GE SmartWater MWF Refrigerator Water Filter, 2-Pack } else { //and //has same title productInfo.title = productInfo.title + ", " + singleVariationItem.label; } saveProductInfo(productInfo); } else { gLogger.Info(String.Format("Invalid product={0}, reason={1}",singleVariationItem.url, invalidReason)); } } private void processSinglePageHtml(string singlePageHtml) { List<crifanLibAmazon.searchResultItem> searchedItemList = new List<crifanLibAmazon.searchResultItem>(); if (amazonLib.extractSearchItemList(singlePageHtml, out searchedItemList)) { foreach (crifanLibAmazon.searchResultItem eachSearchResultItem in searchedItemList) { crifanLibAmazon.productVariationInfo variationInfo = new crifanLibAmazon.productVariationInfo(); gLogger.Info("processing single product url " + eachSearchResultItem.productUrl); if (amazonLib.checkVariation(eachSearchResultItem.productUrl, out variationInfo)) { //have many varation //process each variation List<crifanLibAmazon.variationItem> variationList = variationInfo.variationList; gLogger.Info(String.Format("Total {0} variations for {1}", variationList.Count, eachSearchResultItem.productUrl)); foreach (crifanLibAmazon.variationItem eachVariationItem in variationList) { checkAndExtractForSingleVariation(eachVariationItem); } } else { //no variation -> only current single product //directly process this product gLogger.Info("no variation for " + eachSearchResultItem.productUrl); checkAndExtractForSingleProduct(eachSearchResultItem.productUrl); } } } } private void processEachSearchCategory(string curPageSearchUrl) { gLogger.Info("processing search category " + curPageSearchUrl); string eachPageHtml = ""; bool hasMorePage = true; //get each page html while (hasMorePage) { //fisrt: //then: //eachPageHtml = crl.getUrlRespHtml(curPageSearchUrl); eachPageHtml = crl.getUrlRespHtml_multiTry(curPageSearchUrl); processSinglePageHtml(eachPageHtml); string nextPageUrl = ""; if (amazonLib.extractNextPageUrl(eachPageHtml, out nextPageUrl)) { if (nextPageUrl != "") { //http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dinstant-video#/ref=sr_pg_2?rh=n%3A2858778011&page=2&ie=UTF8&qid=1368688123 //http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dinstant-video#/ref=sr_pg_3?rh=n%3A2858778011&page=3&ie=UTF8&qid=1368688123 hasMorePage = true; } else { hasMorePage = false; break; } } else { //something wrong break; } } } //find matched best seller category for input main category item public bool findMatchedBestSellerCategoryItem(crifanLibAmazon.categoryItem mainCateoryItem, out crifanLibAmazon.categoryItem bestSellerCateoryItem) { bool foundMatchedBestSeller = false; bestSellerCateoryItem = new crifanLibAmazon.categoryItem(); //Method 1: static mapping if (gMainCatMappingBestSellerCatDict != null && (gMainCatMappingBestSellerCatDict.Count > 0)) { if (gMainCatMappingBestSellerCatDict.ContainsKey(mainCateoryItem.Key)) { string bestSellerCategoryKey = gMainCatMappingBestSellerCatDict[mainCateoryItem.Key]; foreach (crifanLibAmazon.categoryItem singleBestSellerCatItem in bestSellerCategoryList) { if (bestSellerCategoryKey.Equals(singleBestSellerCatItem.Key, StringComparison.CurrentCultureIgnoreCase)) { bestSellerCateoryItem = singleBestSellerCatItem; foundMatchedBestSeller = true; break; } } } } //Method 2: dynamic find same category key //bestSellerCateoryItem = new crifanLibAmazon.categoryItem(); //foreach (crifanLibAmazon.categoryItem singleBestSellerCatItem in bestSellerCategoryList) //{ // if (mainCateoryItem.Key.Equals(singleBestSellerCatItem.Key, StringComparison.CurrentCultureIgnoreCase)) // { // bestSellerCateoryItem = singleBestSellerCatItem; // foundMatchedBestSeller = true; // break; // } //} ////not found key match //if (!foundMatchedBestSeller) //{ // //check some specials // //(1) // //Main Category : Best Seller // //mobile-apps : mobile // //arts-crafts : arts // //baby-products : baby // //stripbooks : books // //mobile : wireless // //... //} return foundMatchedBestSeller; } private void searchSingleCategory(crifanLibAmazon.categoryItem singleCateoryItem) { //instant-video string curSearchCategoryKey = singleCateoryItem.Key; //1. general category url //instant-video string generalCategoryUrl = amazonLib.generateMainCategoryUrlFromCategoryKey(curSearchCategoryKey); processEachSearchCategory(singleCateoryItem.Url); //2. Best Sellers crifanLibAmazon.categoryItem bestSellerCategoryItem; if (findMatchedBestSellerCategoryItem(singleCateoryItem, out bestSellerCategoryItem)) { gLogger.Info("Found corrsponding best seller item category url=" + bestSellerCategoryItem.Url); processEachSearchCategory(bestSellerCategoryItem.Url); } else { gLogger.Info("NOT found corrsponding best seller item category url, for: " + singleCateoryItem.Url); } //3. Movers & Shakers //string moversShakersCategoryUrl = ""; //if(curSearchCategoryKey in moversShakersCategoryList) //processEachSearchCategory(moversShakersCategoryUrl); //4. Top Rated //string topRatedCategoryUrl = ""; //if(curSearchCategoryKey in topRatedCategoryList) //processEachSearchCategory(topRatedCategoryUrl); } private void btnSearch_Click(object sender, EventArgs e) { /* * * */ crifanLibAmazon.categoryItem curSelectedCategory = new crifanLibAmazon.categoryItem(); if (cmbSearchCategory.SelectedIndex >= 0) { //has selected some sub category curSelectedCategory = (crifanLibAmazon.categoryItem)cmbSearchCategory.SelectedItem; searchSingleCategory(curSelectedCategory); } } }} |
【总结】
转载请注明：在路上 » 【代码分享】C#代码：ScrapeAmazonProduct – 抓取Amazon产品数据（完全从网页中抓取）