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(Go) 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.
// 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 http := chilkat.NewHttp() bdHtml := chilkat.NewBinData() success := http.QuickGetBd("https://example-code.com/data/etf_table.html",bdHtml) if success != true { fmt.Println(http.LastErrorText()) http.DisposeHttp() bdHtml.DisposeBinData() return } // Convert to XML. htx := chilkat.NewHtmlToXml() htx.SetHtmlBd(bdHtml) sbXml := chilkat.NewStringBuilder() htx.ToXmlSb(sbXml) xml := chilkat.NewXml() xml.LoadSb(sbXml,true) // Remove attributes and sub-trees we don't need. // (In other words, we're getting rid of clutter...) 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... fmt.Println(*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 int var count_i int var table_role *string = new(string) var table_data_scrollx *string = new(string) var table_data_sortdirection *string = new(string) var table_data_sorton *string = new(string) var table_id *string = new(string) var j int var count_j int var tr_role *string = new(string) var k int var count_k int var tagPath string var text *string = new(string) i = 0 count_i = xml.NumChildrenHavingTag("html|body|div") for i < count_i { xml.SetI(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") for j < count_j { xml.SetJ(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") for k < count_k { xml.SetK(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. csv := chilkat.NewCsv() 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") for i < count_i { xml.SetI(i) j = 0 count_j = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr") for j < count_j { xml.SetJ(j) k = 0 count_k = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr[j]|td") for k < count_k { xml.SetK(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") csvStr := csv.SaveToString() fmt.Println(*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" // http.DisposeHttp() bdHtml.DisposeBinData() htx.DisposeHtmlToXml() sbXml.DisposeStringBuilder() xml.DisposeXml() csv.DisposeCsv() |
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