httpform.cxx

pwlib源码库

                              PINDEX & start,
                              PINDEX & finish)
{
  static PRegularExpression Accepted("<?!--#form[ \t\r\n]+accepted[ \t\r\n]*-->?",
                                     PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  return FindSpliceBlock(Accepted, text, offset, pos, len, start, finish);
}


static BOOL FindSpliceErrors(const PString & text,
                            PINDEX offset,
                            PINDEX & pos,
                            PINDEX & len,
                            PINDEX & start,
                            PINDEX & finish)
{
  static PRegularExpression Errors("<?!--#form[ \t\r\n]+errors[ \t\r\n]*-->?",
                                     PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  return FindSpliceBlock(Errors, text, offset, pos, len, start, finish);
}


static BOOL FindSpliceField(const PRegularExpression & startExpr,
                            const PRegularExpression & endExpr,
                            const PString & text,
                            PINDEX offset,
                            const PHTTPField & rootField,
                            PINDEX & pos,
                            PINDEX & len,
                            PINDEX & start,
                            PINDEX & finish,
                            const PHTTPField * & field)
{
  field = NULL;

  if (!FindSpliceBlock(startExpr, endExpr, text, offset, pos, len, start, finish))
    return FALSE;

  PINDEX endBlock = start != finish ? (start-1) : (pos+len-1);
  PINDEX namePos, nameEnd;
  if (FindSpliceName(text, pos, endBlock, namePos, nameEnd))
    field = rootField.LocateName(text(namePos, nameEnd));
  return TRUE;
}


static const char ListFieldDeleteBox[] = "List Row Delete ";

void PHTTPForm::OnLoadedText(PHTTPRequest & request, PString & text)
{
  PINDEX pos, len, start, finish;
  const PHTTPField * field;

  // Remove the subsections for POST command
  pos = 0;
  while (FindSpliceAccepted(text, pos, pos, len, start, finish))
    text.Delete(pos, len);

  pos = 0;
  while (FindSpliceErrors(text, pos, pos, len, start, finish))
    text.Delete(pos, len);

  // See if are a subform, set root composite field accordingly
  PString prefix = request.url.GetQueryVars()("subformprefix");
  if (!prefix) {
    static PRegularExpression SubFormPrefix("<?!--#form[ \t\r\n]+subformprefix[ \t\r\n]*-->?",
                                            PRegularExpression::Extended|PRegularExpression::IgnoreCase);
    while (text.FindRegEx(SubFormPrefix, pos, len))
      text.Splice("subformprefix=" +
                  PURL::TranslateString(prefix, PURL::QueryTranslation),
                  pos, len);
    field = fields.LocateName(prefix);
    if (field != NULL) {
      finish = P_MAX_INDEX;
      field->ExpandFieldNames(text, 0, finish);
    }
  }

  // Locate <!--#form list name--> macros and expand them
  static PRegularExpression ListRegEx("<!--#form[ \t\r\n]+listfields[ \t\r\n]+(-?[^-])+-->",
                                       PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  static PRegularExpression EndBlock("<?!--#form[ \t\r\n]+end[ \t\r\n]+(-?[^-])+-->?",
                                     PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  pos = len = 0;
  while (FindSpliceBlock(ListRegEx, EndBlock, text, pos+len, pos, len, start, finish)) {
    if (start != finish) {
      PString repeat = text(start, finish);

      PINDEX namePos, nameEnd;
      PRegularExpression fieldsRegEx;
      if (FindSpliceName(text, pos, start-1, namePos, nameEnd))
        fieldsRegEx.Compile(text(namePos, nameEnd), PRegularExpression::Extended|PRegularExpression::IgnoreCase);
      else
        fieldsRegEx.Compile(".*");

      PString insert;
      for (PINDEX f = 0; f < fields.GetSize(); f++) {
        if (fields[f].GetName().FindRegEx(fieldsRegEx) != P_MAX_INDEX) {
          PString iteration = repeat;
          PINDEX npos, nlen;

          static PRegularExpression FieldNameRegEx("<?!--#form[ \t\r\n]+fieldname[ \t\r\n]*-->?",
                                                   PRegularExpression::Extended|PRegularExpression::IgnoreCase);
          while (iteration.FindRegEx(FieldNameRegEx, npos, nlen))
            iteration.Splice(fields[f].GetName(), npos, nlen);

          static PRegularExpression RowDeleteRegEx("<?!--#form[ \t\r\n]+rowdelete[ \t\r\n]*-->?",
                                                   PRegularExpression::Extended|PRegularExpression::IgnoreCase);
          while (iteration.FindRegEx(RowDeleteRegEx, npos, nlen)) {
            PHTML html(PHTML::InForm);
            html << PHTML::CheckBox(ListFieldDeleteBox + fields[f].GetName());
            iteration.Splice(html, npos, nlen);
          }

          insert += iteration;
        }
      }
      text.Splice(insert, pos, len);
    }
  }

  // Locate <!--#form array name--> macros and expand them
  static PRegularExpression ArrayRegEx("<!--#form[ \t\r\n]+array[ \t\r\n]+(-?[^-])+-->",
                                       PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  pos = len = 0;
  while (FindSpliceField(ArrayRegEx, EndBlock, text, pos+len, fields, pos, len, start, finish, field)) {
    if (start != finish && field != NULL)
      field->ExpandFieldNames(text, start, finish);
  }

  // Have now expanded all field names to be fully qualified

  static PRegularExpression HTMLRegEx("<!--#form[ \t\r\n]+html[ \t\r\n]+(-?[^-])+-->",
                                      PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  while (FindSpliceField(HTMLRegEx, "", text, 0, fields, pos, len, start, finish, field)) {
    if (field != NULL) {
      PHTML html(PHTML::InForm);
      field->GetHTMLTag(html);
      text.Splice(html, pos, len);
    }
  }

  pos = len = 0;
  static PRegularExpression ValueRegEx("<!--#form[ \t\r\n]+value[ \t\r\n]+(-?[^-])+-->",
                                       PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  while (FindSpliceField(ValueRegEx, "", text, pos+len, fields, pos, len, start, finish, field)) {
    if (field != NULL)
      text.Splice(field->GetValue(), pos, len);
  }

  pos = len = 0;
  static PRegularExpression InputRegEx("<input[ \t\r\n][^>]*name[ \t\r\n]*=[ \t\r\n]*\"[^\"]*\"[^>]*>",
                                       PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  while (FindSpliceField(InputRegEx, "", text, pos+len, fields, pos, len, start, finish, field)) {
    if (field != NULL) {
      static PRegularExpression HiddenRegEx("type[ \t\r\n]*=[ \t\r\n]*\"?hidden\"?",
                                            PRegularExpression::Extended|PRegularExpression::IgnoreCase);
      PString substr = text.Mid(pos, len);
      if (substr.FindRegEx(HiddenRegEx) == P_MAX_INDEX)
        text.Splice(field->GetHTMLInput(substr), pos, len);
    }
  }

  pos = len = 0;
  static PRegularExpression SelectRegEx("<select[ \t\r\n][^>]*name[ \t\r\n]*=[ \t\r\n]*\"[^\"]*\"[^>]*>",
                                        PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  static PRegularExpression SelEndRegEx("</select[^>]*>",
                                        PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  while (FindSpliceField(SelectRegEx, SelEndRegEx, text, pos+len, fields, pos, len, start, finish, field)) {
    if (field != NULL)
      text.Splice(field->GetHTMLSelect(text(start, finish)), start, finish-start+1);
  }

  pos = len = 0;
  static PRegularExpression TextRegEx("<textarea[ \t\r\n][^>]*name[ \t\r\n]*=[ \t\r\n]*\"[^\"]*\"[^>]*>",
                                      PRegularExpression::Extended|PRegularExpression::IgnoreCase);
  static PRegularExpression TextEndRegEx("</textarea[^>]*>", PRegularExpression::IgnoreCase);
  while (FindSpliceField(TextRegEx, TextEndRegEx, text, pos+len, fields, pos, len, start, finish, field)) {
    if (field != NULL)
      text.Splice(field->GetValue(), start, finish-start+1);
  }
}


PHTTPField * PHTTPForm::Add(PHTTPField * fld)
{
  if (PAssertNULL(fld) == NULL)
    return NULL;

  PAssert(!fieldNames[fld->GetName()], "Field already on form!");
  fieldNames += fld->GetName();
  fields.Append(fld);
  return fld;
}


void PHTTPForm::BuildHTML(const char * heading)
{
  PHTML html(heading);
  BuildHTML(html);
}


void PHTTPForm::BuildHTML(const PString & heading)
{
  PHTML html(heading);
  BuildHTML(html);
}


void PHTTPForm::BuildHTML(PHTML & html, BuildOptions option)
{
  if (!html.Is(PHTML::InForm))
    html << PHTML::Form("POST");

  html << PHTML::TableStart("cellspacing=8");
  for (PINDEX fld = 0; fld < fields.GetSize(); fld++) {
    PHTTPField & field = fields[fld];
    if (field.NotYetInHTML()) {
      html << PHTML::TableRow()
           << PHTML::TableData("align=right")
           << field.GetTitle()
           << PHTML::TableData("align=left")
           << "<!--#form html " << field.GetName() << "-->"
           << PHTML::TableData()
           << field.GetHelp();
      field.SetInHTML();
    }
  }
  html << PHTML::TableEnd();
  if (option != InsertIntoForm)
    html << PHTML::Paragraph()
         << ' ' << PHTML::SubmitButton("Accept")
         << ' ' << PHTML::ResetButton("Reset")
         << PHTML::Form();

  if (option == CompleteHTML) {
    html << PHTML::Body();
    string = html;
  }
}


BOOL PHTTPForm::Post(PHTTPRequest & request,
                     const PStringToString & data,
                     PHTML & msg)
{
  //PString prefix = request.url.GetQueryVars()("subformprefix");
  const PHTTPField * field = NULL;
  //if (!prefix)
  //  field = fields.LocateName(prefix);
  //if (field == NULL)
    field = &fields;

  PStringStream errors;
  if (field->ValidateAll(data, errors)) {
    ((PHTTPField *)field)->SetAllValues(data);

    if (msg.IsEmpty()) {
      msg << PHTML::Title() << "Accepted New Configuration" << PHTML::Body()
          << PHTML::Heading(1) << "Accepted New Configuration" << PHTML::Heading(1)
          << PHTML::HotLink(request.url.AsString()) << "Reload page" << PHTML::HotLink()
          << "&nbsp;&nbsp;&nbsp;&nbsp;"
          << PHTML::HotLink("/") << "Home page" << PHTML::HotLink();
    }
    else {
      PString block;
      PINDEX pos = 0;
      PINDEX len, start, finish;
      while (FindSpliceAccepted(msg, pos, pos, len, start, finish))
        msg.Splice(msg(start, finish), pos, len);
      pos = 0;
      while (FindSpliceErrors(msg, pos, pos, len, start, finish))
        msg.Delete(pos, len);
    }
  }
  else {
    if (msg.IsEmpty()) {
      msg << PHTML::Title() << "Validation Error in Request" << PHTML::Body()
          << PHTML::Heading(1) << "Validation Error in Request" << PHTML::Heading(1)
          << errors
          << PHTML::Paragraph()
          << PHTML::HotLink(request.url.AsString()) << "Reload page" << PHTML::HotLink()
          << "&nbsp;&nbsp;&nbsp;&nbsp;"
          << PHTML::HotLink("/") << "Home page" << PHTML::HotLink();
    }
    else {
      PINDEX pos = 0;
      PINDEX len, start, finish;
      while (FindSpliceAccepted(msg, pos, pos, len, start, finish))
        msg.Delete(pos, len);

      BOOL appendErrors = TRUE;
      pos = 0;
      while (FindSpliceErrors(msg, pos, pos, len, start, finish)) {
        PString block = msg(start, finish);
        PINDEX vPos, vLen;
        static PRegularExpression Validation("<?!--#form[ \t\r\n]+validation[ \t\r\n]*-->?",
                                             PRegularExpression::Extended|PRegularExpression::IgnoreCase);
        if (block.FindRegEx(Validation, vPos, vLen))
          block.Splice(errors, vPos, vLen);
        else
          block += errors;
        msg.Splice(block, pos, len);
        appendErrors = FALSE;
      }

      if (appendErrors)
        msg << errors;
    }
  }

  return TRUE;
}


//////////////////////////////////////////////////////////////////////////////
// PHTTPConfig

PHTTPConfig::PHTTPConfig(const PURL & url,
                         const PString & sect)
  : PHTTPForm(url), section(sect)
{
  Construct();
}


PHTTPConfig::PHTTPConfig(const PURL & url,
                         const PString & sect,
                         const PHTTPAuthority & auth)
  : PHTTPForm(url, auth), section(sect)
{
  Construct();
}


PHTTPConfig::PHTTPConfig(const PURL & url,
                         const PString & html,
                         const PString & sect)
  : PHTTPForm(url, html), section(sect)
{
  Construct();
}


PHTTPConfig::PHTTPConfig(const PURL & url,
                         const PString & html,
                         const PString & sect,
                         const PHTTPAuthority & auth)
  : PHTTPForm(url, html, auth), section(sect)
{
  Construct();
}


void PHTTPConfig::Construct()
{
  sectionField = NULL;
  keyField = NULL;
  valField = NULL;
}


void PHTTPConfig::LoadFromConfig()
{
  PConfig cfg(section);
  fields.LoadFromConfig(cfg);
}


void PHTTPConfig::OnLoadedText(PHTTPRequest & request, PString & text)
{
  if (sectionField == NULL) {
    PString sectionName = request.url.GetQueryVars()("section", section);
    if (!sectionName) {
      section = sectionName;
      LoadFromConfig();
    }
  }

  PHTTPForm::OnLoadedText(request, text);
}


BOOL PHTTPConfig::Post(PHTTPRequest & request,
                       const PStringToString & data,
                       PHTML & msg)
{
  // Make sure the internal structure is up to date before accepting new data
  if (!section)
    LoadFromConfig();


  PSortedStringList oldValues;

  // Remember fields that are here now, so can delete removed array fields
  PINDEX fld;
  for (fld = 0; fld < fields.GetSize(); fld++) {
    PHTTPField & field = fields[fld];
    if (&field != keyField && &field != valField && &field != sectionField) {
      PStringList names;
      field.GetAllNames(names);
      oldValues = names;
    }
  }

  PHTTPForm::Post(request, data, msg);
  if (request.code != PHTTP::RequestOK)
    return TRUE;

  if (sectionField != NULL)
    section = sectionPrefix + sectionField->GetValue() + sectionSuffix;

  PString sectionName = request.url.GetQueryVars()("section", section);
  if (sectionName.IsEmpty())
    return TRUE;

  PConfig cfg(sectionName);

  for (fld = 0; fld < fields.GetSize(); fld++) {
    PHTTPField & field = fields[fld];
    if (&field == keyField) {
      PString key = field.GetValue();
      if (!key)
        cfg.SetString(key, valField->GetValue());
    }
    else if (&field != valField && &field != sectionField)
      field.SaveToConfig(cfg);
  }

  // Find out which fields have been removed (arrays elements deleted)
  for (fld = 0; fld < fields.GetSize(); fld++) {
    PHTTPField & field = fields[fld];
    if (&field != keyField && &field != valField && &field != sectionField) {
      PStringList names;
      field.GetAllNames(names);
      for (PINDEX i = 0; i < names.GetSize(); i++) {
        PINDEX idx = oldValues.GetStringsIndex(names[i]);
        if (idx != P_MAX_INDEX)
          oldValues.RemoveAt(idx);
      }
    }
  }

  for (fld = 0; fld < oldValues.GetSize();