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Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:The "h" capability is now used to enable hyperlinks to non-wiki pages. When "h" is missing, many pages give a hyperlink to the login page and automatically fill in "anonymous" as the user name. The login page jumps back to the target page after a successful login.
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SHA1:d57de28756ddf7716d08a04ebfe1f5f2fd8c7687
User & Date: drh 2008-05-05 23:15:29
Context
2008-05-06
12:24
Add the --proxy command-line option that can be used to enable or disable an http proxy on a case by case basis. check-in: f6525990 user: drh tags: trunk
2008-05-05
23:15
The "h" capability is now used to enable hyperlinks to non-wiki pages. When "h" is missing, many pages give a hyperlink to the login page and automatically fill in "anonymous" as the user name. The login page jumps back to the target page after a successful login. check-in: d57de287 user: drh tags: trunk
20:18
Work toward making the "h" permission mean "hyperlink". Without "h", many pages will display, but there are few hyperlinks. A message invites users to login as anonymous. check-in: 2b0d4519 user: drh tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/browse.c. 

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*/
void hyperlinked_path(const char *zPath, Blob *pOut){
  int i, j;
  char *zSep = "";

  for(i=0; zPath[i]; i=j){
    for(j=i; zPath[j] && zPath[j]!='/'; j++){}
    if( zPath[j] ){
      blob_appendf(pOut, "%s<a href=\"%s/dir?name=%#T\">%#h</a>", 
                   zSep, g.zBaseURL, j, zPath, j-i, &zPath[i]);
    }else{
      blob_appendf(pOut, "%s%h", zSep, &zPath[i]);
    }
    zSep = "/";
    while( zPath[j]=='/' ){ j++; }
  }
}










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*/
void hyperlinked_path(const char *zPath, Blob *pOut){
  int i, j;
  char *zSep = "";

  for(i=0; zPath[i]; i=j){
    for(j=i; zPath[j] && zPath[j]!='/'; j++){}
    if( zPath[j] && g.okHistory ){
      blob_appendf(pOut, "%s<a href=\"%s/dir?name=%#T\">%#h</a>", 
                   zSep, g.zBaseURL, j, zPath, j-i, &zPath[i]);
    }else{
      blob_appendf(pOut, "%s%#h", zSep, j-i, &zPath[i]);
    }
    zSep = "/";
    while( zPath[j]=='/' ){ j++; }
  }
}

Changes to src/db.c. 

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  int argc,                  /* number of arguments to the function */
  sqlite3_value **argv       /* values of all function arguments */
){
  const char *zUuid;         /* The UUID to render */
  char *z;                   /* Rendered HTML text */

  zUuid = (const char*)sqlite3_value_text(argv[0]);
  if( zUuid && strlen(zUuid)>=10 ){
    z = mprintf("<tt><a href='%s/vinfo/%t'><span style='font-size:1.5em'>"
                "%#h</span>%h</a></tt>",
                g.zBaseURL, zUuid, 10, zUuid, &zUuid[10]);
    sqlite3_result_text(pCxt, z, -1, free);


  }
}

/*
** SQL function to render a TAGID as a hyperlink to a page describing
** that tag.
*/
................................................................................
  int argc,                  /* number of arguments to the function */
  sqlite3_value **argv       /* values of all function arguments */
){
  int tagid;                 /* The tagid to render */
  char *z;                   /* rendered html text */

  tagid = sqlite3_value_int(argv[0]);

  z = mprintf("<a href='%s/tagview?tagid=%d'>%d</a>", 
                g.zBaseURL, tagid, tagid);



  sqlite3_result_text(pCxt, z, -1, free);
}

/*
** SQL function to render a TAGNAME as a hyperlink to a page describing
** that tag.
*/
................................................................................
  int argc,                  /* number of arguments to the function */
  sqlite3_value **argv       /* values of all function arguments */
){
  const char *zTag;          /* The tag to render */
  char *z;                   /* rendered html text */

  zTag = (const char*)sqlite3_value_text(argv[0]);

  z = mprintf("<a href='%s/tagview?name=%T'>%h</a>", 
                g.zBaseURL, zTag, zTag);



  sqlite3_result_text(pCxt, z, -1, free);
}

/*
** SQL function to escape all characters in a string that have special
** meaning to HTML.
*/








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  int argc,                  /* number of arguments to the function */
  sqlite3_value **argv       /* values of all function arguments */
){
  const char *zUuid;         /* The UUID to render */
  char *z;                   /* Rendered HTML text */

  zUuid = (const char*)sqlite3_value_text(argv[0]);
  if( g.okHistory && zUuid && strlen(zUuid)>=10 ){
    z = mprintf("<tt><a href='%s/vinfo/%t'><span style='font-size:1.5em'>"
                "%#h</span>%h</a></tt>",
                g.zBaseURL, zUuid, 10, zUuid, &zUuid[10]);
    sqlite3_result_text(pCxt, z, -1, free);
  }else{
    sqlite3_result_text(pCxt, zUuid, -1, SQLITE_TRANSIENT);
  }
}

/*
** SQL function to render a TAGID as a hyperlink to a page describing
** that tag.
*/
................................................................................
  int argc,                  /* number of arguments to the function */
  sqlite3_value **argv       /* values of all function arguments */
){
  int tagid;                 /* The tagid to render */
  char *z;                   /* rendered html text */

  tagid = sqlite3_value_int(argv[0]);
  if( g.okHistory ){
    z = mprintf("<a href='%s/tagview?tagid=%d'>%d</a>", 
                  g.zBaseURL, tagid, tagid);
  }else{
    z = mprintf("%d", tagid);
  }
  sqlite3_result_text(pCxt, z, -1, free);
}

/*
** SQL function to render a TAGNAME as a hyperlink to a page describing
** that tag.
*/
................................................................................
  int argc,                  /* number of arguments to the function */
  sqlite3_value **argv       /* values of all function arguments */
){
  const char *zTag;          /* The tag to render */
  char *z;                   /* rendered html text */

  zTag = (const char*)sqlite3_value_text(argv[0]);
  if( g.okHistory ){
    z = mprintf("<a href='%s/tagview?name=%T'>%h</a>", 
                  g.zBaseURL, zTag, zTag);
  }else{
    z = mprintf("%h", zTag);
  }
  sqlite3_result_text(pCxt, z, -1, free);
}

/*
** SQL function to escape all characters in a string that have special
** meaning to HTML.
*/

Changes to src/descendents.c. 

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void leaves_page(void){
  Stmt q;

  login_check_credentials();
  if( !g.okRead ){ login_needed(); return; }

  style_header("Leaves");

  db_prepare(&q,
    "%s"
    "   AND blob.rid IN"
    "       (SELECT cid FROM plink EXCEPT SELECT pid FROM plink)"
    " ORDER BY event.mtime DESC",
    timeline_query_for_www()
  );








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void leaves_page(void){
  Stmt q;

  login_check_credentials();
  if( !g.okRead ){ login_needed(); return; }

  style_header("Leaves");
  login_anonymous_available();
  db_prepare(&q,
    "%s"
    "   AND blob.rid IN"
    "       (SELECT cid FROM plink EXCEPT SELECT pid FROM plink)"
    " ORDER BY event.mtime DESC",
    timeline_query_for_www()
  );

Changes to src/login.c. 

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** WEBPAGE: /logout
**
** Generate the login page
*/
void login_page(void){
  const char *zUsername, *zPasswd, *zGoto;
  const char *zNew1, *zNew2;
  const char *zAnonPw;

  char *zErrMsg = "";

  login_check_credentials();
  zUsername = P("u");
  zPasswd = P("p");
  zGoto = PD("g","index");

  if( P("out")!=0 ){
    const char *zCookieName = login_cookie_name();
    cgi_set_cookie(zCookieName, "", 0, -86400);
    cgi_redirect(zGoto);
  }
  if( g.okPassword && zPasswd && (zNew1 = P("n1"))!=0 && (zNew2 = P("n2"))!=0 ){
    if( db_int(1, "SELECT 0 FROM user"
................................................................................
      cgi_redirect(zGoto);
    }
  }
  style_header("Login/Logout");
  @ %s(zErrMsg)
  @ <form action="login" method="POST">
  if( P("g") ){
    @ <input type="hidden" name="nxp" value="%h(P("g"))">
  }
  @ <table align="left" hspace="10">
  @ <tr>
  @   <td align="right">User ID:</td>



  @   <td><input type="text" name="u" value="" size=30></td>

  @ </tr>
  @ <tr>
  @  <td align="right">Password:</td>
  @   <td><input type="password" name="p" value="" size=30></td>
  @ </tr>










  @ <tr>
  @   <td></td>
  @   <td><input type="submit" name="in" value="Login"></td>
  @ </tr>
  @ </table>
  if( g.zLogin==0 ){
    @ <p>To login
................................................................................
    @ <p>To change your login to a different user
  }
  @ enter the user-id and password at the left and press the
  @ "Login" button.  Your user name will be stored in a browser cookie.
  @ You must configure your web browser to accept cookies in order for
  @ the login to take.</p>
  if( g.zLogin==0 ){
    zAnonPw = db_text(0, "SELECT pw FROM user"
                         " WHERE login='anonymous'"
                         "   AND cap!=''");
    if( zAnonPw ){
      @ <p>If you do not have a user-id, enter "<b>anonymous</b>" with a
      @ password of "<b>%h(zAnonPw)</b>".</p>

    }else{
      @ <p>A valid user-id and password is required.  Anonymous access
      @ is not allowed on this installation.</p>

    }
  }
  if( g.zLogin ){
    @ <br clear="both"><hr>
    @ <p>To log off the system (and delete your login cookie)
    @  press the following button:<br>
    @ <input type="submit" name="out" value="Logout"></p>
................................................................................
** logging in as anonymous.
*/
void login_anonymous_available(void){
  if( !g.okHistory &&
      db_exists("SELECT 1 FROM user"
                " WHERE login='anonymous'"
                "   AND cap LIKE '%%h%%'") ){
    @ <p><b>Note:</b> Many hyperlinks are omitted from this page to discourage
    @ <a href="http://en.wikipedia.org/wiki/Web_crawler">spiders</a>.
    @ You will be able to access information more easily if you
    @ <a href="%s(g.zTop)/login">login</a> as user "anonymous".</p>

  }
}








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** WEBPAGE: /logout
**
** Generate the login page
*/
void login_page(void){
  const char *zUsername, *zPasswd, *zGoto;
  const char *zNew1, *zNew2;
  const char *zAnonPw = 0;
  int anonFlag;
  char *zErrMsg = "";

  login_check_credentials();
  zUsername = P("u");
  zPasswd = P("p");
  zGoto = PD("g","index");
  anonFlag = P("anon")!=0;
  if( P("out")!=0 ){
    const char *zCookieName = login_cookie_name();
    cgi_set_cookie(zCookieName, "", 0, -86400);
    cgi_redirect(zGoto);
  }
  if( g.okPassword && zPasswd && (zNew1 = P("n1"))!=0 && (zNew2 = P("n2"))!=0 ){
    if( db_int(1, "SELECT 0 FROM user"
................................................................................
      cgi_redirect(zGoto);
    }
  }
  style_header("Login/Logout");
  @ %s(zErrMsg)
  @ <form action="login" method="POST">
  if( P("g") ){
    @ <input type="hidden" name="g" value="%h(P("g"))">
  }
  @ <table align="left" hspace="10">
  @ <tr>
  @   <td align="right">User ID:</td>
  if( anonFlag ){
    @   <td><input type="text" name="u" value="anonymous" size=30></td>
  }else{
    @   <td><input type="text" name="u" value="" size=30></td>
  }
  @ </tr>
  @ <tr>
  @  <td align="right">Password:</td>
  @   <td><input type="password" name="p" value="" size=30></td>
  @ </tr>
  if( g.zLogin==0 ){
    zAnonPw = db_text(0, "SELECT pw FROM user"
                         " WHERE login='anonymous'"
                         "   AND cap!=''");
    if( zAnonPw && anonFlag ){
      @ <tr><td></td>
      @ <td>The anonymous password is "<b>%h(zAnonPw)</b>".</td>
      @ </tr>
    }
  }
  @ <tr>
  @   <td></td>
  @   <td><input type="submit" name="in" value="Login"></td>
  @ </tr>
  @ </table>
  if( g.zLogin==0 ){
    @ <p>To login
................................................................................
    @ <p>To change your login to a different user
  }
  @ enter the user-id and password at the left and press the
  @ "Login" button.  Your user name will be stored in a browser cookie.
  @ You must configure your web browser to accept cookies in order for
  @ the login to take.</p>
  if( g.zLogin==0 ){



    if( zAnonPw && !anonFlag ){

      @ <p>The password for user "anonymous" is "<b>%h(zAnonPw)</b>".</p>
      @ <p>&nbsp;</p>
    }else{


      @ <p>&nbsp;</p><p>&nbsp;</p>
    }
  }
  if( g.zLogin ){
    @ <br clear="both"><hr>
    @ <p>To log off the system (and delete your login cookie)
    @  press the following button:<br>
    @ <input type="submit" name="out" value="Logout"></p>
................................................................................
** logging in as anonymous.
*/
void login_anonymous_available(void){
  if( !g.okHistory &&
      db_exists("SELECT 1 FROM user"
                " WHERE login='anonymous'"
                "   AND cap LIKE '%%h%%'") ){
    const char *zUrl = PD("REQUEST_URI", "index");
    @ <p>Many <font color="red">hyperlinks are disabled.</font><br />

    @ Use <a href="%s(g.zTop)/login?anon=1&g=%T(zUrl)">anonymous login</a>
    @ to enable hyperlinks.</p>
  }
}

Changes to src/tagview.c. 

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*/
void tagview_page(void){
  login_check_credentials();
  if( !g.okRdWiki ){
    login_needed();
  }
  style_header("Tags");

  tagview_page_search_miniform();
  @ <hr/>
  char const * check = 0;
  if( 0 != (check = P("tagid")) ){
    tagview_page_tag_by_id( atoi(check) );
  }else if( 0 != (check = P("like")) ){
    tagview_page_list_tags( check );








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*/
void tagview_page(void){
  login_check_credentials();
  if( !g.okRdWiki ){
    login_needed();
  }
  style_header("Tags");
  login_anonymous_available();
  tagview_page_search_miniform();
  @ <hr/>
  char const * check = 0;
  if( 0 != (check = P("tagid")) ){
    tagview_page_tag_by_id( atoi(check) );
  }else if( 0 != (check = P("like")) ){
    tagview_page_list_tags( check );

Changes to src/wikiformat.c. 

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*/
static int is_valid_uuid(const char *z){
  int n = strlen(z);
  if( n<4 || n>UUID_SIZE ) return 0;
  if( !validate16(z, n) ) return 0;
  return 1;
}



















/*
** Resolve a hyperlink.  The argument is the content of the [...]
** in the wiki.  Append the URL to the output of the Renderer.
*/
static void resolveHyperlink(const char *zTarget, Renderer *p){
  if( strncmp(zTarget, "http:", 5)==0 
................................................................................
        break;
      }
      case TOKEN_LINK: {
        char *zTarget;
        char *zDisplay = 0;
        int i, j;
        int savedState;

        startAutoParagraph(p);
        zTarget = &z[1];
        for(i=1; z[i] && z[i]!=']'; i++){
          if( z[i]=='|' && zDisplay==0 ){
            zDisplay = &z[i+1];
            z[i] = 0;
            for(j=i-1; j>0 && isspace(z[j]); j--){ z[j] = 0; }
................................................................................
        }
        z[i] = 0;
        if( zDisplay==0 ){
          zDisplay = zTarget;
        }else{
          while( isspace(*zDisplay) ) zDisplay++;
        }


        blob_append(p->pOut, "<a href=\"", -1);
        resolveHyperlink(zTarget, p);
        blob_append(p->pOut, "\">", -1);

        savedState = p->state;
        p->state &= ~ALLOW_WIKI;
        p->state |= FONT_MARKUP_ONLY;
        wiki_render(p, zDisplay);
        p->state = savedState;
        blob_append(p->pOut, "</a>", 4);
        break;
      }
      case TOKEN_TEXT: {
        startAutoParagraph(p);
        blob_append(p->pOut, z, n);
        break;
      }








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*/
static int is_valid_uuid(const char *z){
  int n = strlen(z);
  if( n<4 || n>UUID_SIZE ) return 0;
  if( !validate16(z, n) ) return 0;
  return 1;
}

/*
** Return true if the given hyperlink should be implemented for
** the current login.
*/
static int okToHyperlink(const char *zTarget){
  if( g.okHistory ) return 1;
  if( strncmp(zTarget, "http:", 5)==0 
   || strncmp(zTarget, "https:", 6)==0
   || strncmp(zTarget, "ftp:", 4)==0 
   || strncmp(zTarget, "mailto:", 7)==0
  ){
    return 1;
  }
  if( zTarget[0]=='/' || is_valid_uuid(zTarget) ) return 0;
  if( wiki_name_is_wellformed(zTarget) ) return 1;
  return 0;
}

/*
** Resolve a hyperlink.  The argument is the content of the [...]
** in the wiki.  Append the URL to the output of the Renderer.
*/
static void resolveHyperlink(const char *zTarget, Renderer *p){
  if( strncmp(zTarget, "http:", 5)==0 
................................................................................
        break;
      }
      case TOKEN_LINK: {
        char *zTarget;
        char *zDisplay = 0;
        int i, j;
        int savedState;
        int ok;
        startAutoParagraph(p);
        zTarget = &z[1];
        for(i=1; z[i] && z[i]!=']'; i++){
          if( z[i]=='|' && zDisplay==0 ){
            zDisplay = &z[i+1];
            z[i] = 0;
            for(j=i-1; j>0 && isspace(z[j]); j--){ z[j] = 0; }
................................................................................
        }
        z[i] = 0;
        if( zDisplay==0 ){
          zDisplay = zTarget;
        }else{
          while( isspace(*zDisplay) ) zDisplay++;
        }
        ok = okToHyperlink(zTarget);
        if( ok ){
          blob_append(p->pOut, "<a href=\"", -1);
          resolveHyperlink(zTarget, p);
          blob_append(p->pOut, "\">", -1);
        }
        savedState = p->state;
        p->state &= ~ALLOW_WIKI;
        p->state |= FONT_MARKUP_ONLY;
        wiki_render(p, zDisplay);
        p->state = savedState;
        if( ok ) blob_append(p->pOut, "</a>", 4);
        break;
      }
      case TOKEN_TEXT: {
        startAutoParagraph(p);
        blob_append(p->pOut, z, n);
        break;
      }

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