Failed assertion 'tream' == line when parsing this PDF

[asedilloglatt]

I am trying to search the text of this PDF I attached 3776_A_City_Council_24-01-09_Notice_and_Agenda.pdf

Here is the function I wrote to search:

static Future pdfContainsText(
String pdfUriString, String searchText) async {
if (pdfUriString.isEmpty || searchText.isEmpty) {
return true;
}

print(pdfUriString);
return await http
    .get(Uri.parse(pdfUriString))
    .then((response) {
      print(response.contentLength);
      return PDFParser(ByteStream(response.bodyBytes)).parse();
    })
    .then((doc) => doc.catalog)
    .then((catalog) => catalog.getPages())
    .then((pages) async {
      String allText = '';
      final firstPage = pages.getPageAtIndex(0);
      PDFPageNode? node = firstPage;
      while (node != null) {
        print(await node.resources);
        allText += (await node.resources).toString();
        node = node.parent;
      }
      return allText;
    })
    .then((pdfTextContent) => pdfTextContent.contains(searchText));

}

I am getting this error when i run my code.
Unhandled exception:
'package:dart_pdf_reader/src/parser/pdf_object_parser.dart': Failed assertion: line 259 pos 12: ''tream' == line': is not true.
#0 _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:51:61)
errors_patch.dart:51
#1 _AssertionError._throwNew (dart:core-patch/errors_patch.dart:40:5)
errors_patch.dart:40
#2 PDFObjectParser._parseStream (package:dart_pdf_reader/src/parser/pdf_object_parser.dart:259:12)
pdf_object_parser.dart:259

#3 PDFObjectParser.parse (package:dart_pdf_reader/src/parser/pdf_object_parser.dart:29:28)
pdf_object_parser.dart:29

#4 parseTrailer (package:dart_pdf_reader/src/parser/pdf_parser.dart:63:10)
pdf_parser.dart:63

[NicolaVerbeeck]

I would need to check the specific pdf to see what is wrong but anyway this method would not work for extracting the text as text is not contained within the resources block but rather as part of the page's content stream. I will look into the assertion though as that is unexpected. This will probably take a few days though

…

On Sat, 6 Jan 2024, 22:53 asedilloglatt, ***@***.***> wrote: I am trying to search the text of this PDF I attached 3776_A_City_Council_24-01-09_Notice_and_Agenda.pdf <https://github.com/NicolaVerbeeck/dart_pdf_reader/files/13851461/3776_A_City_Council_24-01-09_Notice_and_Agenda.pdf> Here is the function I wrote to search: static Future pdfContainsText( String pdfUriString, String searchText) async { if (pdfUriString.isEmpty || searchText.isEmpty) { return true; } print(pdfUriString); return await http .get(Uri.parse(pdfUriString)) .then((response) { print(response.contentLength); return PDFParser(ByteStream(response.bodyBytes)).parse(); }) .then((doc) => doc.catalog) .then((catalog) => catalog.getPages()) .then((pages) async { String allText = ''; final firstPage = pages.getPageAtIndex(0); PDFPageNode? node = firstPage; while (node != null) { print(await node.resources); allText += (await node.resources).toString(); node = node.parent; } return allText; }) .then((pdfTextContent) => pdfTextContent.contains(searchText)); } I am getting this error when i run my code. Unhandled exception: 'package:dart_pdf_reader/src/parser/pdf_object_parser.dart': Failed assertion: line 259 pos 12: ''tream' == line': is not true. #0 _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:51:61) errors_patch.dart:51 #1 <#1> _AssertionError._throwNew (dart:core-patch/errors_patch.dart:40:5) errors_patch.dart:40 #2 <#2> PDFObjectParser._parseStream (package:dart_pdf_reader/src/parser/pdf_object_parser.dart:259:12) pdf_object_parser.dart:259 #3 <#3> PDFObjectParser.parse (package:dart_pdf_reader/src/parser/pdf_object_parser.dart:29:28) pdf_object_parser.dart:29 #4 <#4> parseTrailer (package:dart_pdf_reader/src/parser/pdf_parser.dart:63:10) pdf_parser.dart:63 — Reply to this email directly, view it on GitHub <#50>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AB3LA37OXFZV5XYMMNEJSS3YNHBU5AVCNFSM6AAAAABBP2LB5WVHI2DSMVQWIX3LMV43ASLTON2WKOZSGA3DQOBVGA3TMNQ> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[NicolaVerbeeck]

Release 0.5.1 will fix parsing the PDF. Though as I said, the text is not contained in the resources (which contains things like fonts and images)