javascript - convert blob js to file image php -

-

i try send datauri image using xhr , formdata() , find method tho convert datauri blob 

  function datauritoblob(datauri) {          // convert base64/urlencoded data component raw binary data held in string          var bytestring;          if (datauri.split(',')[0].indexof('base64') >= 0)              bytestring = atob(datauri.split(',')[1]);          else              bytestring = unescape(datauri.split(',')[1]);            // separate out mime component          var mimestring = datauri.split(',')[0].split(':')[1].split(';')[0];            // write bytes of string typed array          var ia = new uint8array(bytestring.length);          (var = 0; < bytestring.length; i++) {              ia[i] = bytestring.charcodeat(i);          }

and send blob var using xhr 

 var blob = datauritoblob(dataurl);          var data = new formdata();          data.append('photos[]', blob, "file.png");            var xhr = new xmlhttprequest();          xhr.open('post', '/upload', true);            xhr.upload.onprogress = function(e) {              if (e.lengthcomputable) {                  var percentcomplete = (e.loaded / e.total) * 100;                  console.log(percentcomplete + '% uploaded');              }          };          xhr.onload = function() {                  alert(this.response);                  var resp = json.parse(this.response);                  console.log('server got:', resp);            };          xhr.send(data);

next , recive var photos[] , blob object , cant save file 

  function storeblob($blob, $filename)      {          $blobre = '/^data:((\w+)\/(\w+));base64,(.*)$/';          if (preg_match($blobre, $blob, $m))          {              $imagename = (preg_match('/\.\w{2,4}$/', $filename) ? $filename : sprintf('%s.%s', $filename, $m[3]));                return file_put_contents($imagename,base64_decode($m[4]));          }          return false; // error      }


Comments

Post a Comment

Popular posts from this blog

java - nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet Hibernate+SpringMVC -

-
i trying fetch records database , having above error this classs appropriate getters , setters public class user { private int id; private string username; private string password; private string email; i have create database , inserted data below configuration <bean id="datasource" class="org.apache.commons.dbcp2.basicdatasource" destroy-method="close"> <property name="driverclassname" value="com.mysql.jdbc.driver"/> <property name="url" value="jdbc:mysql://localhost:3306/usersdb"/> <property name="username" value="root"/> <property name="password" value=""/> </bean> this complete stacktrace severe: servlet.service() servlet [appservlet] in context path [/spring] threw exception [request processing failed; nested exception org.hibernate.exception.sqlgrammarexception: not ...
Read more

sql - Postgresql tables exists, but getting "relation does not exist" when querying -

-
Image
i have postgresql db number of tables. if query: select column_name information_schema.columns table_name="my_table"; i list of columns returned properly. however, when query: select * "my_table"; i error: (programmingerror) relation "my_table" not exist 'select *\n "my_table"\n' {} any thoughts on why can columns, can't query table? goal able query table. you have include schema if isnt public one select * <schema>."my_table" or can change default schema show search_path; set search_path my_schema; check table schema here select * information_schema.columns for example if table on default schema public both works ok select * parroquias_region select * public.parroquias_region but sectors need specify schema select * map_update.sectores_point
Read more

asp.net mvc - breakpoint on javascript in CSHTML? -

-
i have .cshtml file has javascript tag. within script tag have few lines of javascript. first line of javascript refers property in @viewbag. other javascript lines plain script without mvc related references. observation: can place breakpoints (visual studio 2015) on each of these javascript lines. however, breakpoints has white dot in center of breakpoint symbol (red circle) except line @viewbag reference (this particular line not have white dot in center). it seems breakpoint without white dot hit during run-time. question: can explain going on here? white dot mean? why plain red breakpoint line line hitting breakpoint? the visual studio debugger expecting debug actual server-side code within .cshtml file opposed client-side javascript within it. iirc, visual studio allow debug javascript code expected in internet explorer (and possibly edge), other browsers want use either third-party tool or developer tools (f12) within browser. an easy approach take advant...
Read more