javascript - Copy and paste images from clipboard, blob Error -


i'm trying copy , paste images clipboard, error message in chrome. wrong?

js fiddle

error

uncaught typeerror: failed execute 'readasdataurl' on 'filereader': argument not blob.

js

 $(function() { $("body").bind("paste", function(ev) {     var $this = $(this);     var original =  ev.originalevent;     var file =  original.clipboarddata.items[0].getasfile();     var reader = new filereader();     reader.onload = function (evt) {         var result = evt.target.result;          var arr = result.split(",");         var data = arr[1]; // raw base64         var contenttype = arr[0].split(";")[0].split(":")[1];          // needs post server route can accept raw base64 content , save file                     $.post("/echo/html/", {             contenttype: contenttype,             data: data         });                                         $this.append("<img src='" + result + "' />");     };      reader.readasdataurl(file);     });         });

you're problem that, when browser trying load file through clipboard, looking blob type of data.

blob, or b inary l arge ob ject lengthy string object, instead of being file, string.

by trying copy clipboard, has copy of directory of file, @ least how error , how code is, that's looks like, isn't blob file type, chrome isn't set handle actual file.

i don't know for, if trying save files on database, should have image uploaded through form, have them placed in directory unique name, , store location of each image, actual path, on database.

then, can loop through , need do.

if want, post code have project did this, ask if want it.

it work if you're using mysql server tho; code written in php.

blob wiki article


Comments

Post a Comment

Popular posts from this blog

javascript - jquery or ashx not working -

i using ajax file upload control. it creating html: <form action="/pages/handlers/asyncfileuploadhandler.ashx" method="post" enctype="multipart/form-data" target="ajaxuploader-iframe-1397144545"> <input type="hidden" name="type" value="mindvoice"> <input type="file" id="imagefile" style="display: block; width: 80%; margin-right: auto; margin-left: auto;"> </form> and target is: <iframe width="0" height="0" style="display:none;" name="ajaxuploader-iframe-1397144545" id="ajaxuploader-iframe-1397144545"></iframe> the form submitted using .submit() . my ashx handler: <%@ webhandler language="c#" class="asyncfileuploadhandler" %> using system; using system.web; using nettpals.core; public class asyncfileuploadhandler : ihttphandler { public void processre...
Read more

opencv - DataType<cv::detail::deriv_type>::depth what is it used for -

i wondering why line used in lucas kanade tracker in opencv: datatype<cv::detail::deriv_type>::depth can explain me? in opencv, depth of mat refers type of data contained in mat 's data buffer. represented integer values correspond given data type. these integers commonly abstracted appropriate macro definition (e.g. uchar data represented macro cv_8u ). cv::datatype type-traits class provides method obtain corresponding integer value without having memorize macro means data type. there few cases user code needs use datatype::depth . more common datatype::type . a simple example shows 1 possible use of datatype::depth : cv::mat uchar_data = cv::mat::ones(3, 3, cv_8uc1); cv::mat float_data; uchar_data.convertto(float_data, cv::datatype<float>::depth); // ^^ equivalently replaced // cv_32f macro float_data.at<float>(0,1) += 0.5f; std::cout << float_data << std::endl;...
Read more

python 3.x - Mapping specific letters onto a list of words -

can please suggest approach write piece of codes automatically maps letter in letter_str onto dic_key (a dict key string type contains dashes match length of words in word_lst)? so, mapping occurs if letter appears in every words in list @ same position no matter how many words in list. if no letter appears @ position words in word list new_dic_key '----'. please see examples below thanks word_lst = ['ague', 'bute', 'byre', 'came', 'case', 'doze'] dic_key = '----' letters_str ='abcdefghijklmnopqrstuvwxyz' new_dic_key = '---e' if word_list = ['bute', 'byre'] new_dic_key = 'b--e' or word_list = ['drek', 'drew', 'dyes'] new_dic_key = 'd-e-' if words in word_list of same length code give want: word_list = ['drek', 'drew', 'dyes'] cols = [] in range(len(word_list[0])): cols.append([]) word in ...
Read more