Add file shared link, and modify url viewing file

forms.py

@@ -32,3 +32,13 @@ class AddUserForm(forms.Form):
             if self.cleaned_data['password1'] != self.cleaned_data['password2']:
                 raise forms.ValidationError(_("The two password fields didn't match."))
         return self.cleaned_data
+
+class FileLinkShareForm(forms.Form):
+    """
+    Form for sharing file shared link to emails.
+    """
+
+    email = forms.CharField(max_length=512)
+    file_shared_link = forms.CharField(max_length=40)
+
+        

media/css/seahub.css

@@ -466,6 +466,7 @@ table img {
     margin-top:8px;
 }
 /*repo-share-form*/
+#email,
 #email_or_group,
 #share-link,
 #added-member-name {
@@ -653,3 +654,4 @@ table img {
     max-width: 550px;
     max-height: 550px;
 }
+

share/models.py

@@ -1,8 +1,21 @@
+import datetime
 from django.db import models
 
 class AnonymousShare(models.Model):
+    """
+    Model used for sharing repo to unregistered email.
+    """
     repo_owner = models.EmailField(max_length=255)
     repo_id = models.CharField(max_length=36)
     anonymous_email = models.EmailField(max_length=255)
     token = models.CharField(max_length=25, unique=True)
-        
+
+class FileShare(models.Model):
+    """
+    Model used for file share link.
+    """
+    username = models.EmailField(max_length=255)
+    repo_id = models.CharField(max_length=36, db_index=True)
+    path = models.TextField()
+    token = models.CharField(max_length=10, unique=True)
+    ctime = models.DateTimeField(default=datetime.datetime.now)

templates/repo.html

@@ -153,9 +153,9 @@
             <tr>
               <td class="icon-container"><img src="{{ MEDIA_URL }}img/{{ dirent.obj_name|file_icon_filter }}" alt="文件" /></td>
               {% if view_history %}
-              <td><a class="op" href="{{ SITE_ROOT }}repo/{{ repo.props.id }}/view/{{ dirent.props.obj_id }}/?commit_id={{ current_commit.id }}&file_name={{ dirent.props.obj_name }}&p={{ path|urlencode }}{{ dirent.obj_name|urlencode }}">{{ dirent.props.obj_name }}</a></td>              
+              <td><a class="op" href="{{ SITE_ROOT }}repo/{{ repo.props.id }}/files/?obj_id={{ dirent.props.obj_id }}&commit_id={{ current_commit.id }}&p={{ path|urlencode }}{{ dirent.obj_name|urlencode }}">{{ dirent.props.obj_name }}</a></td>              
               {% else %}
-              <td><a class="op" href="{{ SITE_ROOT }}repo/{{ repo.props.id }}/view/{{ dirent.props.obj_id }}/?file_name={{ dirent.props.obj_name }}&p={{ path|urlencode }}{{ dirent.obj_name|urlencode }}">{{ dirent.props.obj_name }}</a></td>
+              <td><a class="op" href="{{ SITE_ROOT }}repo/{{ repo.props.id }}/files/?p={{ path|urlencode }}{{ dirent.obj_name|urlencode }}">{{ dirent.props.obj_name }}</a></td>
               {% endif %}
 
               <td>{{ dirent.file_size|filesizeformat }}</td>

templates/repo_view_file.html

@@ -25,6 +25,17 @@
       <p><a href="{{ SITE_ROOT }}repo/{{ repo.id }}/{{ obj_id }}/?file_name={{ file_name }}&op=view" target="_blank">查看原始文件</a></p>
       <p><a href="{{ SITE_ROOT }}repo/file_revisions/{{ repo.id }}/?p={{ path|urlencode }}">查看所有历史版本</a></p>
       <p><a href="{{ SITE_ROOT }}repo/{{ repo.id }}/{{ obj_id }}/?file_name={{ file_name }}&op=download" target="_blank">下载文件</a></p>
+
+      {% if not view_history %}
+      <h3>共享</h3>
+      <p class="shared-link">
+        <span class="hide">链接：{{ file_shared_link }}</span>
+        <a href="#" data="{{ SITE_ROOT }}sharedlink/get/?repo_id={{ repo.id }}&p={{ path|urlencode }}&file_name={{ file_name }}" class="get-shared-link">获取分享链接</a></p>
+      <div class="link-op hide">      
+        <a href="#" class="send-shared-link">发送</a>
+        <a href="#" data="{{ SITE_ROOT }}sharedlink/remove/?t={{ fileshare.token }}" class="remove-shared-link">删除</a>
+      </div>
+      {% endif %}
     </div>
 
     <div class="main fleft">
@@ -44,17 +55,53 @@
           </p>
           <pre id="file-content">正在读取文件内容...</pre>
     </div>
+
+    <form id="link-send-form" action="" method="post" name="link-send-form" class="hide">
+      <label>邮箱：</label><br />
+      <textarea id="email" name="email"></textarea><br />
+      <input id="file_shared_link" type="hidden" name="file_shared_link" value="{{ file_shared_link }}" />
+      <p class="error hide">输入不能为空。</p>
+      <p class="success hide"></p>
+      <p class="sending hide">发送中...</p>
+      <input type="submit" value="提交" id="share-submit-btn" />
+    </form>
+
 {% endblock %}
 
 {% block extra_script %}
 <script type="text/javascript">
-    $(window).load(function() {
+function showLink() {
+    $('.shared-link a').addClass('hide');
+    $('.shared-link span').removeClass('hide');
+    $('.link-op').removeClass('hide');
+}
+function hideLink() {
+    $('.shared-link span').addClass('hide');
+    $('.link-op').addClass('hide');
+    $('.shared-link a').removeClass('hide');
+}
+
+$(window).load(function() {
     var can_preview = "{{ can_preview }}";
+    var view_history = "{{ view_history }}";
+    var url = "";
+    if (view_history == 'True') {
+        url = "{{ SITE_ROOT }}repo/{{ repo.id }}/file/get/?obj_id={{ obj_id }}&p={{ path }}&t={{ token }}&u={{ request.user.username }}";
+    } else {
+        url = "{{ SITE_ROOT }}repo/{{ repo.id }}/file/get/?p={{ path }}&t={{ token }}&u={{ request.user.username }}";
+    }
+
     var filetype = "{{ filetype }}";
+    var t = "{{ fileshare.token }}";
+    if (t) {
+        showLink();
+    } else {
+        hideLink();
+    }
     
     if (can_preview == 'True' && filetype == 'Document') {
       $.ajax({
-          url: '{{ SITE_ROOT }}repo/{{ repo.id }}/view/{{ obj_id }}/?file_name={{ file_name }}&t={{ token }}',
+          url: url,
           dataType: 'json',
           cache: false,
           contentType: 'application/json; charset=utf-8',
@@ -69,12 +116,119 @@
           }
       });
       return false;
-  } else if (can_preview == 'True' && filetype == 'Image') {
+    } else if (can_preview == 'True' && filetype == 'Image') {
       $('#file-content').replaceWith('<img class="img-preview" src="{{ raw_path }}"></img>');
-  } else {
+    } else {
       $('#file-content').html('无法识别该文件格式，<a class="op" href="{{ SITE_ROOT }}repo/{{ repo.id }}/{{ obj_id }}/?file_name={{ file_name }}&op=download">下载文件</a>。');
-  }
+    }
-  });
+});
-  
+
+$('.get-shared-link').click(function() {
+    var url = $(this).attr('data');
+    $.ajax({
+        url: url,
+        dataType: 'json',
+        cache: false,
+        contentType: 'application/json; charset=utf-8',
+        success: function(data) {
+            if (data.length > 0) {
+                var t = data[0]['token'];
+                var shared_link = '{{ protocol }}://{{ domain }}{{ SITE_ROOT }}f/' + t + '/';
+                $('.shared-link span').html('链接：' + shared_link);
+                $('.remove-shared-link').attr('data', '{{ SITE_ROOT }}sharedlink/remove/?t='+t);
+                showLink();
+            }
+        },
+        error: function(xhr, ajaxOptions, thrownError) {
+            var jsonVal = jQuery.parseJSON(xhr.responseText);
+            $('.get-shared-link').html(jsonVal[0]['error']);
+        }
+    });
+    return false;
+});
+
+$('.remove-shared-link').click(function() {
+    var url = $(this).attr('data');
+    $.ajax({
+        url: url,
+        dataType: 'json',
+        cache: false,
+        contentType: 'application/json; charset=utf-8',
+        success: function(data) {
+            hideLink();
+        }
+    });
+    return false;
+});
+
+$('.send-shared-link').click(function() {
+    $("#link-send-form").modal({appendTo: "#main"});
+});
+
+$("#link-send-form").submit(function(event) {
+    // clear error and sucess msg
+    $('.error').html("").addClass('hide');
+    $('.success').html("").addClass('hide');
+    $('.sending').removeClass('hide');
+    $('#simplemodal-container').css('height', $('#link-send-form').height());
+
+    var form = $(this), 
+        file_shared_link = form.children('input[name="file_shared_link"]').val(),
+        email = form.children('textarea[name="email"]').val();
+       
+   if (email && email.length <= 512) {
+       // prepare django csrf token
+       $.ajaxSetup({ 
+           beforeSend: function(xhr, settings) {
+               function getCookie(name) {
+               var cookieValue = null;
+               if (document.cookie && document.cookie != '') {
+                   var cookies = document.cookie.split(';');
+                   for (var i = 0; i < cookies.length; i++) {
+                       var cookie = jQuery.trim(cookies[i]);
+                       // Does this cookie string begin with the name we want?
+                       if (cookie.substring(0, name.length + 1) == (name + '='))        {
+                          cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
+                          break;
+                       }
+                   }
+               }
+               return cookieValue;
+               }
+               if (!(/^http:.*/.test(settings.url) || /^https:.*/.test(settings.url))) {
+                  // Only send the token to relative URLs i.e. locally.
+                  xhr.setRequestHeader("X-CSRFToken", getCookie('csrftoken'));
+               }
+           } 
+       });   
+       $.ajax({
+           type: "POST",
+           url: "{{ SITE_ROOT }}sharedlink/send/",
+           dataType: 'json',
+           cache: false,
+           contentType: 'application/json; charset=utf-8',
+           data: "file_shared_link="+file_shared_link+"&email="+email,
+           success: function(data) {
+               form.children('.error').addClass('hide');
+               form.children('.sending').addClass('hide');
+               form.children('.success').html(data[0]['msg']).removeClass('hide');
+               $('#simplemodal-container').css('height', $('#link-send-form').height());
+           },
+           error: function(xhr, ajaxOptions, thrownError) {
+               var jsonVal = jQuery.parseJSON(xhr.responseText);
+               form.children('.success').addClass('hide');
+               form.children('.sending').addClass('hide');
+               form.children('.error').html(jsonVal[0]['error']).removeClass('hide');
+               $('#simplemodal-container').css('height', $('#link-send-form').height());
+           }
+       });
+   } else {
+       form.children('.success').html("").addClass('hide');
+       form.children('.sending').addClass('hide');
+       form.children('.error').removeClass('hide');
+   }
+   return false;
+});
+
 </script>
 {% endblock %}

templates/shared_link_email.html

@@ -0,0 +1,12 @@
+{% autoescape off %}
+亲爱的 {{ to_email }}：
+
+{{ email }} 在SeaCloud上共享了一个文件给你，请点击以下链接查看：
+
+{{ file_shared_link }}
+
+感谢使用我们的网站！
+
+Seafile团队
+
+{% endautoescape %}

templates/view_shared_file.html

@@ -0,0 +1,54 @@
+{% extends "myhome_base.html" %}
+{% load seahub_tags %}
+
+{% block main_panel %}
+    <h2 class="subject">
+        {{ file_name }}<br />
+        <span class="latest-commit-time-author">共享者：{{ username }}</span>
+    </h2>
+    
+    <div class="side fright">
+      <h3>操作</h3>
+      <p><a href="{{ SITE_ROOT }}repo/{{ repo.id }}/{{ obj_id }}/?file_name={{ file_name }}&op=view" target="_blank">查看原始文件</a></p>
+      <p><a href="{{ SITE_ROOT }}repo/{{ repo.id }}/{{ obj_id }}/?file_name={{ file_name }}&op=download" target="_blank">下载文件</a></p>
+    </div>
+
+    <div class="main fleft">
+      <pre id="file-content">正在读取文件内容...</pre>
+    </div>
+
+{% endblock %}
+
+{% block extra_script %}
+<script type="text/javascript">
+$(window).load(function() {
+    var can_preview = "{{ can_preview }}";
+    var url = "{{ SITE_ROOT }}repo/{{ repo.id }}/file/get/?t={{ access_token }}&p={{ path }}&u={{ username }}";
+    var filetype = "{{ filetype }}";
+    
+    if (can_preview == 'True' && filetype == 'Document') {
+      $.ajax({
+          url: url,
+          dataType: 'json',
+          cache: false,
+          contentType: 'application/json; charset=utf-8',
+          success: function(data) {
+              if (data.length > 0) {
+                    $('#file-content').html(data[0]['content']);
+              }
+          },
+          error: function(xhr, ajaxOptions, thrownError) {
+              var jsonVal = jQuery.parseJSON(xhr.responseText);
+              $('#file-content').html(jsonVal[0]['error']);
+          }
+      });
+      return false;
+    } else if (can_preview == 'True' && filetype == 'Image') {
+      $('#file-content').replaceWith('<img class="img-preview" src="{{ raw_path }}"></img>');
+    } else {
+      $('#file-content').html('无法识别该文件格式，<a class="op" href="{{ SITE_ROOT }}repo/{{ repo.id }}/{{ obj_id }}/?file_name={{ file_name }}&op=download">下载文件</a>。');
+    }
+});
+
+</script>
+{% endblock %}

urls.py

@@ -6,13 +6,14 @@ from seahub.views import root, peers, myhome, \
     repo, repo_history, modify_token, remove_repo, sys_seafadmin, sys_useradmin, \
     org_seafadmin, org_useradmin, org_group_admin, org_remove, \
     activate_user, user_add, user_remove, sys_group_admin, sys_org_admin, \
-    ownerhome, repo_history_revert, \
+    ownerhome, repo_history_revert, repo_file_get, \
     user_info, repo_set_access_property, repo_access_file, \
     repo_remove_share, repo_download, org_info, repo_view_file, \
     seafile_access_check, back_local, repo_history_changes, \
-    repo_upload_file, file_upload_progress, file_upload_progress_page, get_subdir, file_move, \
+    repo_upload_file, file_upload_progress, file_upload_progress_page, \
-    repo_new_dir, repo_rename_file, validate_filename, \
+    get_subdir, file_move, repo_new_dir, repo_rename_file, validate_filename, \
-    repo_create, repo_update_file, file_revisions
+    repo_create, repo_update_file, file_revisions, \
+    get_shared_link, view_shared_file, remove_shared_link, send_shared_link
 from seahub.notifications.views import notification_list
 from seahub.share.views import share_admin
 from seahub.group.views import group_list
@@ -42,7 +43,11 @@ urlpatterns = patterns('',
     (r'^share/', include('share.urls')),
     url(r'^shareadmin/$', share_admin, name='share_admin'),
     (r'^shareadmin/removeshare/$', repo_remove_share),
-
+    (r'^sharedlink/get/$', get_shared_link),
+    (r'^sharedlink/remove/$', remove_shared_link),
+    (r'^sharedlink/send/$', send_shared_link),
+    (r'^f/(?P<token>[^/]+)/$', view_shared_file),
+                       
     (r'^file_upload_progress/$', file_upload_progress),
     (r'^file_upload_progress_page/$', file_upload_progress_page),
     (r'^repo/new_dir/$', repo_new_dir),
@@ -61,7 +66,8 @@ urlpatterns = patterns('',
 #    (r'^repo/removefetched/(?P<user_id>[^/]+)/(?P<repo_id>[^/]+)/$', remove_fetched_repo),
 #    (r'^repo/setap/(?P<repo_id>[^/]+)/$', repo_set_access_property),
     url(r'^repo/(?P<repo_id>[^/]+)/(?P<obj_id>[^/]+)/$', repo_access_file, name='repo_access_file'),
-    (r'^repo/(?P<repo_id>[^/]+)/view/(?P<obj_id>[^/]+)/$', repo_view_file),
+    (r'^repo/(?P<repo_id>[^/]+)/files/$', repo_view_file),
+    (r'^repo/(?P<repo_id>[^/]+)/file/get/$', repo_file_get),
                        
     (r'^download/repo/$', repo_download),                       
     (r'^file/move/get_subdir/$', get_subdir),                       

utils.py

@@ -68,13 +68,13 @@ def get_ccnetapplet_root():
         ccnet_applet_root = settings.CCNET_APPLET_ROOT
     return ccnet_applet_root
 
-def gen_token():
+def gen_token(max_length=5):
     """
-    Generate short token used for owner to access repo file.
+    Generate a random token.
 
     """
 
-    token = sha_constructor(settings.SECRET_KEY + unicode(time.time())).hexdigest()[:5]
+    token = sha_constructor(settings.SECRET_KEY + unicode(time.time())).hexdigest()[:max_length]
     return token
 
 def validate_group_name(group_name):

views.py

@@ -24,6 +24,7 @@ from auth.decorators import login_required
 from auth.forms import AuthenticationForm, PasswordResetForm, SetPasswordForm, \
     PasswordChangeForm
 from auth.tokens import default_token_generator
+from share.models import FileShare
 from seaserv import ccnet_rpc, ccnet_threaded_rpc, get_groups, get_users, get_repos, \
     get_repo, get_commits, get_branches, \
     seafserv_threaded_rpc, seafserv_rpc, get_binding_peerids, get_ccnetuser, \
@@ -33,7 +34,7 @@ from pysearpc import SearpcError
 from seahub.base.accounts import CcnetUser
 from seahub.contacts.models import Contact
 from seahub.notifications.models import UserNotification
-from forms import AddUserForm
+from forms import AddUserForm, FileLinkShareForm
 from utils import go_permission_error, go_error, list_to_string, \
     get_httpserver_root, get_ccnetapplet_root, gen_token, \
     calculate_repo_last_modify, valid_previewed_file, \
@@ -147,8 +148,9 @@ def gen_path_link(path, repo_name):
     Generate navigate paths and links in repo page.
     
     """
-    if path[-1:] != '/':
+    if path and path[-1] != '/':
         path += '/'
+
     paths = []
     links = []
     if path and path != '/':
@@ -210,7 +212,6 @@ def render_repo(request, repo_id, error=''):
     
     # query repo infomation
     repo_size = seafserv_threaded_rpc.server_repo_size(repo_id)
-#    latest_commit = get_commits(repo_id, 0, 1)[0]
 
     # get repo dirents
     dirs = []
@@ -789,61 +790,37 @@ def repo_del_file(request, repo_id):
     url = reverse('repo', args=[repo_id]) + ('?p=%s' % parent_dir)
     return HttpResponseRedirect(url)
 
-def repo_view_file(request, repo_id, obj_id):
+def repo_view_file(request, repo_id):
+    """
+    Preview file on web, including files in current worktree and history.
+    """
     http_server_root = get_httpserver_root()
-    filename = urllib2.quote(request.GET.get('file_name', '').encode('utf-8'))
+    path = request.GET.get('p', '/')
+    if path[-1] != '/':
+        path = path + '/'
+    filename = urllib2.quote(os.path.basename(path[:-1]).encode('utf-8'))
+
     commit_id = request.GET.get('commit_id', '')
     view_history = True if commit_id else False
     current_commit = seafserv_threaded_rpc.get_commit(commit_id)
     if not current_commit:
         current_commit = get_commits(repo_id, 0, 1)[0]
 
-    if request.is_ajax():
+    if view_history:
-        content_type = 'application/json; charset=utf-8'
+        obj_id = request.GET.get('obj_id', '')
-        token = request.GET.get('t')
+    else:
-        tmp_str = '%s/access?repo_id=%s&id=%s&filename=%s&op=%s&t=%s&u=%s'
-        redirect_url = tmp_str % (http_server_root,
-                                  repo_id, obj_id,
-                                  filename, 'view', 
-                                  token,
-                                  request.user.username)
         try:
-            proxied_request = urllib2.urlopen(redirect_url)
+            obj_id = seafserv_rpc.get_file_by_path(repo_id, path[:-1])
-            if long(proxied_request.headers['Content-Length']) > FILE_PREVIEW_MAX_SIZE:
+        except:
-                data = json.dumps([{'error': '文件超过10M，无法在线查看。'}])
+            obj_id = None
-                return HttpResponse(data, status=400, content_type=content_type)
+
-            else:
+    if not obj_id:
-                content = proxied_request.read()
+        return go_error(request, '文件不存在')
-        except urllib2.HTTPError, e:
-            err = 'HTTPError: 无法在线打开该文件'
-            data = json.dumps([{'error': err}])
-            return HttpResponse(data, status=400, content_type=content_type)
-        except urllib2.URLError as e:
-            err = 'URLError: 无法在线打开该文件'
-            data = json.dumps([{'error': err}])
-            return HttpResponse(data, status=400, content_type=content_type)
-        else:
-            l, d = [], {}
-            try:
-                # XXX: file in windows is encoded in gbk
-                u_content = content.decode('gbk')                
-            except:
-                u_content = content.decode('utf-8')
-            from django.utils.html import escape
-            d['content'] = re.sub("\r\n|\n", "<br />", escape(u_content))
-            l.append(d)
-            data = json.dumps(l)
-            return HttpResponse(data, status=200, content_type=content_type)
     
     repo = get_repo(repo_id)
     if not repo:
         raise Http404
 
-    # if a repo doesn't have access property in db, then assume it's 'own'
-    repo_ap = seafserv_threaded_rpc.repo_query_access_property(repo_id)
-    if not repo_ap:
-        repo_ap = 'own'
-
     # if a repo is shared to me, then I can view and download file no mater whether
     # repo's access property is 'own' or 'public'
     if check_shared_repo(request, repo_id):
@@ -852,30 +829,22 @@ def repo_view_file(request, repo_id, obj_id):
         share_to_me = False
             
     token = ''        
-    if repo_ap == 'own':
+    # people who is owner or this repo is shared to him, can visit the repo;
-        # people who is owner or this repo is shared to him, can visit the repo;
+    # others, just go to 404 page           
-        # others, just go to 404 page           
+    if validate_owner(request, repo_id) or share_to_me:
-        if validate_owner(request, repo_id) or share_to_me:
+        # owner should get a token to visit repo                
-            # owner should get a token to visit repo                
+        token = gen_token()
-            token = gen_token()
+        # put token into memory in seaf-server
-            # put token into memory in seaf-server
+        seafserv_rpc.web_save_access_token(token, obj_id)
-            seafserv_rpc.web_save_access_token(token, obj_id)
+    else:
-        else:
+        raise Http404
-            raise Http404
 
-    # query commit info
-    commit_id = request.GET.get('commit_id', None)
-    current_commit = seafserv_threaded_rpc.get_commit(commit_id)
-    if not current_commit:
-        current_commit = get_commits(repo.id, 0, 1)[0]
-        
     # generate path and link
-    path = request.GET.get('p', '/')
     zipped = gen_path_link(path, repo.name)
 
-    # filename
+    # determin whether file can preview on web
     can_preview, filetype = valid_previewed_file(filename)
-
+    
     # raw path
     tmp_str = '%s/access?repo_id=%s&id=%s&filename=%s&op=%s&t=%s&u=%s'
     raw_path = tmp_str % (http_server_root,
@@ -883,12 +852,26 @@ def repo_view_file(request, repo_id, obj_id):
                           filename, 'view', 
                           token,
                           request.user.username)
-    
+
+    # file share link
+    l = FileShare.objects.filter(repo_id=repo_id).filter(path=path[:-1])
+    fileshare = l[0] if len(l) > 0 else None
+
+    http_or_https = request.is_secure() and 'https' or 'http'
+    domain = RequestSite(request).domain
+    if fileshare:
+        file_shared_link = '%s://%s%sf/%s/' % (http_or_https, domain,
+                                               settings.SITE_ROOT,
+                                               fileshare.token)
+    else:
+        file_shared_link = ''
+
     return render_to_response('repo_view_file.html', {
             'repo': repo,
             'path': path,
             'obj_id': obj_id,
             'file_name': filename,
+            'path': path,
             'zipped': zipped,
             'view_history': view_history,
             'current_commit': current_commit,
@@ -896,8 +879,76 @@ def repo_view_file(request, repo_id, obj_id):
             'can_preview': can_preview,
             'filetype': filetype,
             'raw_path': raw_path,
+            'fileshare': fileshare,
+            'protocol': http_or_https,
+            'domain': domain,
+            'file_shared_link': file_shared_link,
             }, context_instance=RequestContext(request))
- 
+
+def repo_file_get(request, repo_id):
+    """
+    Handle ajax request to get file content from httpserver.
+    If get current worktree file, need access_token, path and username from
+    url params.
+    If get history file, need access_token, path username and obj_id from
+    url params.
+    """
+    if not request.is_ajax():
+        return Http404
+
+    http_server_root = get_httpserver_root()
+    content_type = 'application/json; charset=utf-8'
+    access_token = request.GET.get('t')
+    path = request.GET.get('p', '/')
+    if path[-1] == '/':
+        path = path[:-1]
+        
+    filename = urllib2.quote(os.path.basename(path).encode('utf-8'))
+    obj_id = request.GET.get('obj_id', '')
+    if not obj_id:
+        try:
+            obj_id = seafserv_rpc.get_file_by_path(repo_id, path)
+        except:
+            obj_id = None
+    if not obj_id:
+        data = json.dumps([{'error': '获取文件数据失败'}])
+        return HttpResponse(data, status=400, content_type=content_type)
+
+    username = request.GET.get('u', '')
+    tmp_str = '%s/access?repo_id=%s&id=%s&filename=%s&op=%s&t=%s&u=%s'
+    redirect_url = tmp_str % (http_server_root,
+                              repo_id, obj_id,
+                              filename, 'view', 
+                              access_token,
+                              username)
+    try:
+        proxied_request = urllib2.urlopen(redirect_url)
+        if long(proxied_request.headers['Content-Length']) > FILE_PREVIEW_MAX_SIZE:
+            data = json.dumps([{'error': '文件超过10M，无法在线查看。'}])
+            return HttpResponse(data, status=400, content_type=content_type)
+        else:
+            content = proxied_request.read()
+    except urllib2.HTTPError, e:
+        err = 'HTTPError: 无法在线打开该文件'
+        data = json.dumps([{'error': err}])
+        return HttpResponse(data, status=400, content_type=content_type)
+    except urllib2.URLError as e:
+        err = 'URLError: 无法在线打开该文件'
+        data = json.dumps([{'error': err}])
+        return HttpResponse(data, status=400, content_type=content_type)
+    else:
+        l, d = [], {}
+        try:
+            # XXX: file in windows is encoded in gbk
+            u_content = content.decode('gbk')                
+        except:
+            u_content = content.decode('utf-8')
+        from django.utils.html import escape
+        d['content'] = re.sub("\r\n|\n", "<br />", escape(u_content))
+        l.append(d)
+        data = json.dumps(l)
+        return HttpResponse(data, status=200, content_type=content_type)
+    
 def repo_access_file(request, repo_id, obj_id):
     if repo_id:
         repo = get_repo(repo_id)
@@ -1756,3 +1807,163 @@ def file_revisions(request, repo_id):
                % (commit_id, file_name, path)
         return HttpResponseRedirect(url)
 
+@login_required
+def get_shared_link(request):
+    """
+    Handle ajax request to generate file shared link.
+    """
+    if not request.is_ajax():
+        raise Http404
+    
+    content_type = 'application/json; charset=utf-8'
+    
+    repo_id = request.GET.get('repo_id')
+    obj_id = request.GET.get('obj_id')
+    path = request.GET.get('p', '/')
+    if path[-1] == '/':
+        path = path[:-1]
+
+    l = FileShare.objects.filter(repo_id=repo_id).filter(path=path)
+    if len(l) > 0:
+        fileshare = l[0]
+        token = fileshare.token
+    else:
+        token = gen_token(max_length=10)
+        
+        fs = FileShare()
+        fs.username = request.user.username
+        fs.repo_id = repo_id
+        fs.path = path
+        fs.token = token
+
+        try:
+            fs.save()
+        except IntegrityError, e:
+            err = '获取分享链接失败，请重新获取'
+            data = json.dumps([{'error': err}])
+            return HttpResponse(data, status=500, content_type=content_type)
+    
+    data = json.dumps([{'token': token}])
+    return HttpResponse(data, status=200, content_type=content_type)
+
+def view_shared_file(request, token):
+    """
+    Preview file via shared link.
+    """
+    assert token is not None    # Checked by URLconf
+
+    try:
+        fileshare = FileShare.objects.get(token=token)
+    except FileShare.DoesNotExist:
+        raise Http404
+
+    username = fileshare.username
+    repo_id = fileshare.repo_id
+    path = fileshare.path
+
+    http_server_root = get_httpserver_root()
+    if path[-1] == '/':
+        path = path[:-1]
+    filename = os.path.basename(path)
+    quote_filename = urllib2.quote(filename.encode('utf-8'))
+
+    try:
+        obj_id = seafserv_rpc.get_file_by_path(repo_id, path)
+    except:
+        obj_id = None
+
+    if not obj_id:
+        return go_error(request, '文件不存在')
+    
+    repo = get_repo(repo_id)
+    if not repo:
+        raise Http404
+
+    access_token = gen_token()
+    seafserv_rpc.web_save_access_token(access_token, obj_id)
+    
+    can_preview, filetype = valid_previewed_file(filename)
+    
+    # raw path
+    tmp_str = '%s/access?repo_id=%s&id=%s&filename=%s&op=%s&t=%s&u=%s'
+    raw_path = tmp_str % (http_server_root,
+                          repo_id, obj_id,
+                          quote_filename, 'view', 
+                          access_token,
+                          username)
+
+    return render_to_response('view_shared_file.html', {
+            'repo': repo,
+            'obj_id': obj_id,
+            'path': path,
+            'file_name': filename,
+            'token': token,
+            'access_token': access_token,
+            'can_preview': can_preview,
+            'filetype': filetype,
+            'raw_path': raw_path,
+            'username': username,
+            }, context_instance=RequestContext(request))
+
+@login_required
+def remove_shared_link(request):
+    """
+    Handle ajax request to remove file shared link.
+    """
+    if not request.is_ajax():
+        raise Http404
+
+    content_type = 'application/json; charset=utf-8'
+    
+    token = request.GET.get('t', '')
+    FileShare.objects.filter(token=token).delete()
+
+    msg = '删除成功'
+    data = json.dumps([{'msg': msg}])
+    return HttpResponse(data, status=200, content_type=content_type)
+    
+@login_required
+def send_shared_link(request):
+    """
+    Handle ajax post request to share file shared link.
+    """
+    if not request.is_ajax() and not request.method == 'POST':
+        raise Http404
+
+    content_type = 'application/json; charset=utf-8'
+    
+    form = FileLinkShareForm(request.POST)
+    if not form.is_valid():
+        err = '发送失败'
+        data = json.dumps([{'error':err}])
+        return HttpResponse(data, status=400, content_type=content_type)
+
+    email = form.cleaned_data['email']
+    file_shared_link = form.cleaned_data['file_shared_link']
+
+    # Handle the diffent separator
+    to_email_str = email.replace(';',',')
+    to_email_str = to_email_str.replace('\n',',')
+    to_email_str = to_email_str.replace('\r',',')
+    to_email_list = to_email_str.split(',')
+
+    t = loader.get_template('shared_link_email.html')
+    for to_email in to_email_list:
+        c = {
+            'email': request.user.username,
+            'to_email': to_email,
+            'file_shared_link': file_shared_link,
+            }
+        
+        try:
+            send_mail('您的好友通过SeaCloud分享了一个文件给您',
+                      t.render(Context(c)), None, [to_email],
+                      fail_silently=False)
+        except:
+            err = '发送失败'
+            data = json.dumps([{'error':err}])
+            return HttpResponse(data, status=400, content_type=content_type)
+            
+    msg = '发送成功。'
+    data = json.dumps([{'msg': msg}])
+    return HttpResponse(data, status=200, content_type=content_type)