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(C++) 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.
#include <CkHttp.h> #include <CkBinData.h> #include <CkHtmlToXml.h> #include <CkStringBuilder.h> #include <CkXml.h> #include <CkCsv.h> void ChilkatSample(void) { // 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 CkHttp http; CkBinData bdHtml; bool success = http.QuickGetBd("https://example-code.com/data/etf_table.html",bdHtml); if (success != true) { std::cout << http.lastErrorText() << "\r\n"; return; } // Convert to XML. CkHtmlToXml htx; htx.SetHtmlBd(bdHtml); CkStringBuilder sbXml; htx.ToXmlSb(sbXml); CkXml xml; xml.LoadSb(sbXml,true); // Remove attributes and sub-trees we don't need. // (In other words, we're getting rid of clutter...) int 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... std::cout << xml.getXml() << "\r\n"; // 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: // int i; int count_i; const char *table_role = 0; const char *table_data_scrollx = 0; const char *table_data_sortdirection = 0; const char *table_data_sorton = 0; const char *table_id = 0; int j; int count_j; const char *tr_role = 0; int k; int count_k; const char *tagPath = 0; const char *text = 0; i = 0; count_i = xml.NumChildrenHavingTag("html|body|div"); while (i < count_i) { xml.put_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.put_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.put_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. CkCsv 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.put_I(i); j = 0; count_j = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr"); while (j < count_j) { xml.put_J(j); k = 0; count_k = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr[j]|td"); while (k < count_k) { xml.put_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"); const char *csvStr = csv.saveToString(); std::cout << csvStr << "\r\n"; // 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" // } |
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