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(Objective-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.
#import <CkoHttp.h> #import <CkoBinData.h> #import <CkoHtmlToXml.h> #import <CkoStringBuilder.h> #import <CkoXml.h> #import <NSString.h> #import <CkoCsv.h> // 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 CkoHttp *http = [[CkoHttp alloc] init]; CkoBinData *bdHtml = [[CkoBinData alloc] init]; BOOL success = [http QuickGetBd: @"https://example-code.com/data/etf_table.html" binData: bdHtml]; if (success != YES) { NSLog(@"%@",http.LastErrorText); return; } // Convert to XML. CkoHtmlToXml *htx = [[CkoHtmlToXml alloc] init]; [htx SetHtmlBd: bdHtml]; CkoStringBuilder *sbXml = [[CkoStringBuilder alloc] init]; [htx ToXmlSb: sbXml]; CkoXml *xml = [[CkoXml alloc] init]; [xml LoadSb: sbXml autoTrim: YES]; // Remove attributes and sub-trees we don't need. // (In other words, we're getting rid of clutter...) int numRemoved = [[xml PruneTag: @"thead"] intValue]; numRemoved = [[xml PruneAttribute: @"style"] intValue]; numRemoved = [[xml PruneAttribute: @"class"] intValue]; // Scrub the element and attribute content. [xml Scrub: @"ContentTrimEnds,ContentTrimInside,AttrTrimEnds,AttrTrimInside"]; // Let's see what we have... NSLog(@"%@",[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: // int i; int count_i; NSString *table_role = 0; NSString *table_data_scrollx = 0; NSString *table_data_sortdirection = 0; NSString *table_data_sorton = 0; NSString *table_id = 0; int j; int count_j; NSString *tr_role = 0; int k; int count_k; NSString *tagPath = 0; NSString *text = 0; i = 0; count_i = [[xml NumChildrenHavingTag: @"html|body|div"] intValue]; while (i < count_i) { xml.I = [NSNumber numberWithInt: 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"] intValue]; while (j < count_j) { xml.J = [NSNumber numberWithInt: 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"] intValue]; while (k < count_k) { xml.K = [NSNumber numberWithInt: 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. CkoCsv *csv = [[CkoCsv alloc] init]; [csv SetColumnName: [NSNumber numberWithInt: 0] columnName: @"Ticker"]; [csv SetColumnName: [NSNumber numberWithInt: 1] columnName: @"Name"]; [csv SetColumnName: [NSNumber numberWithInt: 2] columnName: @"Sector"]; [csv SetColumnName: [NSNumber numberWithInt: 3] columnName: @"Country"]; [csv SetColumnName: [NSNumber numberWithInt: 4] columnName: @"Weight"]; [csv SetColumnName: [NSNumber numberWithInt: 5] columnName: @"Notional Vaue"]; i = 0; count_i = [[xml NumChildrenHavingTag: @"html|body|div"] intValue]; while (i < count_i) { xml.I = [NSNumber numberWithInt: i]; j = 0; count_j = [[xml NumChildrenHavingTag: @"html|body|div[i]|table|tbody|tr"] intValue]; while (j < count_j) { xml.J = [NSNumber numberWithInt: j]; k = 0; count_k = [[xml NumChildrenHavingTag: @"html|body|div[i]|table|tbody|tr[j]|td"] intValue]; while (k < count_k) { xml.K = [NSNumber numberWithInt: k]; [csv SetCell: [NSNumber numberWithInt: j] col: [NSNumber numberWithInt: k] content: [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"]; NSString *csvStr = [csv SaveToString]; NSLog(@"%@",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" // |
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