blob

Passing OracleLob as parameter to a function

由 可紊 提交于 2020-01-15 11:42:09
问题 I want to accomplish a similar thing: try { openConnection(); OracleCommand cmd = new OracleCommand("SELECT CUSTOMER_ID, IMAGE_BLOB FROM CUSTOMER_IMAGE WHERE CUSTOMER_ID IN (3026)", conn); string pubID = ""; OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess); //create the report object MemoryStream memStream; DataSet ds = new DataSet(); DataTable ImageTable = new DataTable(); BinaryReader binReader; DataRow dr; byte[] byteArrName; OracleLob blob; while (reader.Read(

azure blob parallel blob deleting

由 微笑、不失礼 提交于 2020-01-15 09:03:33
问题 I want to fast delete many blobs from azure storage. Azure method for delete blob is awaitable. I have more than 1000 blobs to delete. My question is if it is faster to delete blobs in parallel, for example in 20 parallel tasks? 来源： https://stackoverflow.com/questions/56022917/azure-blob-parallel-blob-deleting

Storing binaries in database: do I miss some drawbacks in this particular situation?

由 孤者浪人 提交于 2020-01-15 08:07:27
问题 I know this theme has been widely discussed in the past, and I thoroughly analysed the many insightful answers on the matter - confirming my idea that, generally , storing blobs in the db is bad practice. Now let's take a look at the following scenarios: There's users , which has a one-to-many relationship with images ; The images rows would contain, apart from users ' FK and some metadata (date, title...), the following binaries (or file paths pointing to the following binaries): Thumbnail

How can I control the filename when HTML5 audio is saved by the user?

由 旧城冷巷雨未停 提交于 2020-01-15 03:39:11
问题 On my blog a radio channel can be listened, either the live broadcast, or the previous broadcasts from the archive of the channel by a timetable. I would like to achieve that visitors would be able to save these older broadcasts with their distinctive programme name. When visitors click on the given timestamp, the appropriate or appropriately parameterized URL is loaded into a HTML5 audio object's source. There are two kinds of URL formats, the first one, only for the current day: http:/

Zend/PHP: Problem uploading/downloading file to/from MySQL's BLOB field

由 五迷三道 提交于 2020-01-14 23:28:55
问题 I am uploading file(pdf for now) like this: (It is uploading content of file in blob field of mysql) $organizationModel = new Model_Organization_Object( organizationId ); $myFile = file_get_contents( '../path/to/my/file/filename.ext' ); $organizationModel->setOrganizationProfile( $myFile ); $organizationModel->save(); Now I want to get that file from database and want to download. I doing this in controller's action: (I am aspecting pdf file here therefore it is hardcoded below. But in future

Zend/PHP: Problem uploading/downloading file to/from MySQL's BLOB field

由 匆匆过客 提交于 2020-01-14 23:25:51
问题 I am uploading file(pdf for now) like this: (It is uploading content of file in blob field of mysql) $organizationModel = new Model_Organization_Object( organizationId ); $myFile = file_get_contents( '../path/to/my/file/filename.ext' ); $organizationModel->setOrganizationProfile( $myFile ); $organizationModel->save(); Now I want to get that file from database and want to download. I doing this in controller's action: (I am aspecting pdf file here therefore it is hardcoded below. But in future

Should JDBC Blob (not) be free()'d after use?

由 我只是一个虾纸丫 提交于 2020-01-14 19:29:25
问题 Just whacking together an export from an old DB that contains binary data, I stumbled over an exception in one of our utility methods: java.lang.AbstractMethodError: net.sourceforge.jtds.jdbc.BlobImpl.free() After checking our codebase, I found that utility method was never used until now, bascially it looks like this: public BinaryHolder getBinary(final int columnIndex) throws SQLException { Blob blob = null; try { blob = resultSet.getBlob(columnIndex); final BinaryHolder binary =

下载图片（vue 下载图片）

由 蹲街弑〆低调 提交于 2020-01-14 19:25:56
downloadImg(){ const url = this.imgUrl // window.open(_this.detail.imgUrl) let xmlhttp=new XMLHttpRequest(); xmlhttp.open("GET",url,true); xmlhttp.responseType = "blob"; xmlhttp.onload = function(){ if (this.status == 200) { const blob = this.response; const link = document.createElement('a'); link.href = window.URL.createObjectURL(blob); link.download = url.substring(url.lastIndexOf("/")+1, url.length); //此写法兼容可火狐浏览器 document.body.appendChild(link); const evt = document.createEvent("MouseEvents"); evt.initEvent("click", false, false); link.dispatchEvent(evt); window.URL.revokeObjectURL(link

FormData 对象的使用

由 泄露秘密 提交于 2020-01-14 11:37:47
FormData 对象的使用 FormData对象用以将数据编译成键值对，以便用 XMLHttpRequest 来发送数据。其主要用于发送表单数据，但亦可用于发送带键数据(keyed data)，而独立于表单使用。如果表单 enctype 属性设为 multipart/form-data ，则会使用表单的 submit() 方法来发送数据，从而，发送数据具有同样形式。 从零开始创建FormData对象 你可以自己创建一个 FormData 对象，然后调用它的 append() 方法来添加字段，像这样： var formData = new FormData(); formData.append("username", "Groucho"); formData.append("accountnum", 123456); //数字123456会被立即转换成字符串 "123456" // HTML 文件类型input，由用户选择 formData.append("userfile", fileInputElement.files[0]); // JavaScript file-like 对象 var content = '<a id="a"><b id="b">hey!</b></a>'; // 新文件的正文... var blob = new Blob([content], {

Upload very large files(>5GB)

由 牧云@^-^@ 提交于 2020-01-14 10:37:30
问题 I need your help. I want to create a upload script with HTML, JQuery and PHP. Is it possible to write a script, that can upload very large files(> 5 GB)? I've try it with FileReader, FormData and Blobs, but even with these, i can't upload large files(my browser crashes after selecting a large file). PS: I want to write it myself. Don't post any finished scripts. Regards 回答1: Yes. I wrote PHP to upload file exactly 5GB more then one year ago. FileReader, FormData and Blobs will fail because
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