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(Node.js) HTML Table to CSVDemonstrates a method for converting an HTML table to a CSV file. Note: This example requires Chilkat v9.5.0.77 or greater.
var os = require('os'); if (os.platform() == 'win32') { if (os.arch() == 'ia32') { var chilkat = require('@chilkat/ck-node21-win-ia32'); } else { var chilkat = require('@chilkat/ck-node21-win64'); } } else if (os.platform() == 'linux') { if (os.arch() == 'arm') { var chilkat = require('@chilkat/ck-node21-arm'); } else if (os.arch() == 'x86') { var chilkat = require('@chilkat/ck-node21-linux32'); } else { var chilkat = require('@chilkat/ck-node21-linux64'); } } else if (os.platform() == 'darwin') { if (os.arch() == 'arm64') { var chilkat = require('@chilkat/ck-node21-mac-m1'); } else { var chilkat = require('@chilkat/ck-node21-macosx'); } } function chilkatExample() { // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // First download the HTML containing the table var http = new chilkat.Http(); var bdHtml = new chilkat.BinData(); var success = http.QuickGetBd("https://example-code.com/data/etf_table.html",bdHtml); if (success !== true) { console.log(http.LastErrorText); return; } // Convert to XML. var htx = new chilkat.HtmlToXml(); htx.SetHtmlBd(bdHtml); var sbXml = new chilkat.StringBuilder(); htx.ToXmlSb(sbXml); var xml = new chilkat.Xml(); xml.LoadSb(sbXml,true); // Remove attributes and sub-trees we don't need. // (In other words, we're getting rid of clutter...) var numRemoved = xml.PruneTag("thead"); numRemoved = xml.PruneAttribute("style"); numRemoved = xml.PruneAttribute("class"); // Scrub the element and attribute content. xml.Scrub("ContentTrimEnds,ContentTrimInside,AttrTrimEnds,AttrTrimInside"); // Let's see what we have... console.log(xml.GetXml()); // We have the following XML. // Copy this XML into the online tool at Generate Parsing Code from XML // as a starting point for accessing the data.. // <?xml version="1.0" encoding="utf-8"?> // <root> // <html> // <head> // <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> // </head> // <body text="#000000" bgcolor="#FFFFFF"> // <div> // <div> // <table role="grid" data-scrollx="true" data-sortdirection="desc" data-sorton="-1"/> // </div> // </div> // <div> // <table id="topHoldingsTable" role="grid" data-scrollx="true" data-sortdirection="desc" data-sorton="-1"> // <tbody> // <tr role="row"> // <td> // <text>ITUB4</text> // </td> // <td> // <text>ITAU UNIBANCO HOLDING PREF SA</text> // </td> // <td> // <text>Financials</text> // </td> // <td> // <text>Brazil</text> // </td> // <td> // <text>10.94</text> // </td> // <td> // <text>998,954,813.73</text> // </td> // </tr> // <tr role="row"> // <td> // <text>BBDC4</text> // </td> // <td> // <text>BANCO BRADESCO PREF SA</text> // </td> // <td> // <text>Financials</text> // </td> // <td> // <text>Brazil</text> // </td> // <td> // <text>9.01</text> // </td> // <td> // <text>822,164,622.75</text> // </td> // </tr> // ... // ... // ... // </tbody> // </table> // </div> // </body> // </html> // </root> // // This is the code generated by the online tool: // var i; var count_i; var table_role; var table_data_scrollx; var table_data_sortdirection; var table_data_sorton; var table_id; var j; var count_j; var tr_role; var k; var count_k; var tagPath; var text; i = 0; count_i = xml.NumChildrenHavingTag("html|body|div"); while (i < count_i) { xml.I = i; table_role = xml.ChilkatPath("html|body|div[i]|div|table|(role)"); table_data_scrollx = xml.ChilkatPath("html|body|div[i]|div|table|(data-scrollx)"); table_data_sortdirection = xml.ChilkatPath("html|body|div[i]|div|table|(data-sortdirection)"); table_data_sorton = xml.ChilkatPath("html|body|div[i]|div|table|(data-sorton)"); table_id = xml.ChilkatPath("html|body|div[i]|table|(id)"); table_role = xml.ChilkatPath("html|body|div[i]|table|(role)"); table_data_scrollx = xml.ChilkatPath("html|body|div[i]|table|(data-scrollx)"); table_data_sortdirection = xml.ChilkatPath("html|body|div[i]|table|(data-sortdirection)"); table_data_sorton = xml.ChilkatPath("html|body|div[i]|table|(data-sorton)"); j = 0; count_j = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr"); while (j < count_j) { xml.J = j; tr_role = xml.ChilkatPath("html|body|div[i]|table|tbody|tr[j]|(role)"); k = 0; count_k = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr[j]|td"); while (k < count_k) { xml.K = k; text = xml.GetChildContent("html|body|div[i]|table|tbody|tr[j]|td[k]|text"); k = k+1; } j = j+1; } i = i+1; } // Let's modify the above code to build the CSV. var csv = new chilkat.Csv(); csv.SetColumnName(0,"Ticker"); csv.SetColumnName(1,"Name"); csv.SetColumnName(2,"Sector"); csv.SetColumnName(3,"Country"); csv.SetColumnName(4,"Weight"); csv.SetColumnName(5,"Notional Vaue"); i = 0; count_i = xml.NumChildrenHavingTag("html|body|div"); while (i < count_i) { xml.I = i; j = 0; count_j = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr"); while (j < count_j) { xml.J = j; k = 0; count_k = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr[j]|td"); while (k < count_k) { xml.K = k; csv.SetCell(j,k,xml.GetChildContent("html|body|div[i]|table|tbody|tr[j]|td[k]|text")); k = k+1; } j = j+1; } i = i+1; } csv.SaveFile("qa_output/brasil_etf.csv"); var csvStr = csv.SaveToString(); console.log(csvStr); // Our CSV looks like this: // Ticker,Name,Sector,Country,Weight,Notional Vaue // ITUB4,ITAU UNIBANCO HOLDING PREF SA,Financials,Brazil,10.94,"998,954,813.73" // BBDC4,BANCO BRADESCO PREF SA,Financials,Brazil,9.01,"822,164,622.75" // VALE3,CIA VALE DO RIO DOCE SH,Materials,Brazil,8.60,"785,290,260.07" // PETR4,PETROLEO BRASILEIRO PREF SA,Energy,Brazil,5.68,"518,124,434.10" // PETR3,PETROBRAS,Energy,Brazil,4.86,"443,254,438.53" // B3SA3,B3 BRASIL BOLSA BALCAO SA,Financials,Brazil,4.57,"417,636,740.16" // ABEV3,AMBEV SA,Consumer Staples,Brazil,4.57,"417,216,913.63" // BBAS3,BANCO DO BRASIL SA,Financials,Brazil,3.25,"296,921,232.15" // ITSA4,ITAUSA INVESTIMENTOS ITAU PREF SA,Financials,Brazil,2.90,"265,153,684.52" // LREN3,LOJAS RENNER SA,Consumer Discretionary,Brazil,2.25,"205,832,175.98" // } chilkatExample(); |
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