大约有 3,600 项符合查询结果（耗时：0.0345秒） [XML]
Paperclip::Errors::MissingRequiredValidatorError with Rails 4
... Paperclip will also throw "Missing Required Validator Error" in case of PDF file upload. The workaround for that is: First install the "GhostScript" and then add "application/pdf" to content-type.
– HackerKarma
Mar 10 '14 at 15:41
...
How do I upload a file with metadata using a REST web service?
...8029299
Content-Disposition: form-data; name="name"; filename="myfilename.pdf"
Content-Type: application/octet-stream
%PDF-1.4
%
2 0 obj
<</Length 57/Filter/FlateDecode>>stream
x+r
26S00SI2P0Qn
F
!i\
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[
endstream
endobj
4 0 obj
<</Type/Page/MediaBox[0 0 595 842]/Resourc...
Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...pache两种工作模式区别及配置切换1、Redhat Linux下查看apache版本号在Apache安装目录bin下，使用以下命令查看即可。使用命令：. httpd -v示例：2、查看Apache当前工作模...1、Redhat Linux下查看apache版本号
在Apache安装目录bin下，使用以下...
File Upload ASP.NET MVC 3.0
...GetExtension(Request.Files[0].FileName).ToLower();
if (extension != ".pdf" && extension != ".doc" && extension != ".docx" && extension != ".rtf" && extension != ".txt")
{
ModelState.AddModelError("uploadError", "Supported file extensions: pdf, doc, do...
Pandoc markdown page break
... to use raw LaTeX \newpage. This works perfectly when outputting LaTeX (or pdf created through LaTeX). However, one will run into problems when targeting different formats like HTML or docx.
A simple solution when targeting other formats is to use a pandoc filter which can transform the internal do...
开源MQTT网关：EMQX vs Mosquitto - 创客硬件开发 - 清泛IT社区，为创新赋能！
...用单线程架构。Mosquitto 支持 MQTT 协议的 5.0、3.1.1 和 3.1 版本，同时支持 SSL/TLS 和 WebSockets。轻量级设计使其适合部署在嵌入式设备或资源有限的服务器上。优点：易于安装使用支持 MQTT 5.0 协议轻量高效积极的社区支持
缺点：可...
Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
...Syv服务/etc/rc.d/init.d/postfix脚本
脚本朋友们可以从附件中下载
4、对postfix进行基本配置，测试启动发信
编辑/etc/postfix/main.cf
myhostname = mail.huatuo.com #指定运行postfix邮件系统的主机的主机名
myorigin = huatuo.com #指明发...
Specifying and saving a figure with exact size in pixels
...I is not supported by all backends. Here, the PNG backend is used, but the pdf and ps backends will implement the size differently. Also, changing the DPI and sizes will also affect things like fontsize. A larger DPI will keep the same relative sizes of fonts and elements, but if you want smaller fo...
Disabling browser print options (headers, footers, margins) from page?
...from the margins; see What does the mozdisallowselectionprint attribute in PDF.js do?.
Other browsers
Unfortunately, there seems to be no way to resolve this problem in Internet Explorer, so you'll have to resort to PDF or ask users to disable margin texts.
The same goes for Safari; according to a c...
Why does C++11 not support designated initializer lists as C99? [closed]
... standard: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0329r4.pdf
This brings limited support for c99's Designated Initializers. This limitation is described as follows by C.1.7[diff.decl].4, given:
struct A { int x, y; };
struct B { struct A a; };
The following Designated Initializa...