ESP01, GCC, Eclipse - how do I conveniently upload extended HTML with multiple quotes?

Question 1

Use lwIP httpd’s makefsdata to turn your /www folder into fsdata.c arrays and serve files by path. This avoids massive #define strings and brittle escaping. Automate it with an Eclipse pre‑build step so assets regenerate on every build. Then serve with correct headers and Content‑Type. As one expert put it, “Use makefsdata, which will generate arrays for you from your file package.” [Elektroda, miszczo997, post #21541385]

Answer

Use lwIP httpd’s makefsdata to turn your /www folder into fsdata.c arrays and serve files by path. This avoids massive #define strings and brittle escaping. Automate it with an Eclipse pre‑build step so assets regenerate on every build. Then serve with correct headers and Content‑Type. As one expert put it, “Use makefsdata, which will generate arrays for you from your file package.” [Elektroda, miszczo997, post #21541385]

Question 2

You can, but it’s hard to maintain and easy to break. Preprocessor #define for large content is discouraged. Prefer const data or a generated file table instead. That keeps your code readable and avoids nested macro pitfalls. A lightweight HTTP server should abstract these details for you. [Elektroda, JacekCz, post #21541115]

Answer

You can, but it’s hard to maintain and easy to break. Preprocessor #define for large content is discouraged. Prefer const data or a generated file table instead. That keeps your code readable and avoids nested macro pitfalls. A lightweight HTTP server should abstract these details for you. [Elektroda, JacekCz, post #21541115]

Question 3

Yes. C++11 (2011) added raw string literals, written as R"(…)", which keep quotes and newlines unescaped. C has no raw strings, so this only helps if you compile as C++. Enable C++11 in your toolchain and convert big HTML blobs to raw strings. This is a clean alternative when not using a file generator. [String and character literals (C++)]

Answer

Yes. C++11 (2011) added raw string literals, written as R"(…)", which keep quotes and newlines unescaped. C has no raw strings, so this only helps if you compile as C++. Enable C++11 in your toolchain and convert big HTML blobs to raw strings. This is a clean alternative when not using a file generator. [String and character literals (C++)]

Question 4

Answer

Add a Pre‑Build step: Project > Properties > C/C++ Build > Settings > Build Steps; Command: cmd /c "..\utils\makefsdata.bat".
Place makefsdata.exe and a makefsdata.bat script in your project; the script runs the tool on your www folder and moves fsdata.c into your httpd directory.
Build. The www folder becomes fsdata.c on every compile. [Elektroda, miszczo997, post #21541447]

Question 5

Grab the tool from lwIP httpd example repositories. In the thread, a GitHub path was shared containing makefsdata sources and the executable. Build it or use the provided exe for Windows. This gives you a simple way to package HTML, JS, and CSS into a single fsdata.c file. [Elektroda, miszczo997, post #21544649]

Answer

Grab the tool from lwIP httpd example repositories. In the thread, a GitHub path was shared containing makefsdata sources and the executable. Build it or use the provided exe for Windows. This gives you a simple way to package HTML, JS, and CSS into a single fsdata.c file. [Elektroda, miszczo997, post #21544649]

Question 6

Place the missing DLL (e.g., msvcr100d.dll) in the same directory as makefsdata.exe. The error dialog tells you which DLL is required. After copying, rerun the tool or your pre‑build step. This resolves the dependency and lets the generator produce fsdata.c correctly. [Elektroda, miszczo997, post #21541447]

Answer

Place the missing DLL (e.g., msvcr100d.dll) in the same directory as makefsdata.exe. The error dialog tells you which DLL is required. After copying, rerun the tool or your pre‑build step. This resolves the dependency and lets the generator produce fsdata.c correctly. [Elektroda, miszczo997, post #21541447]

Question 7

You are likely sending only the body without HTTP headers. Prepend a valid status line and headers, including Content‑Type: text/html. Alternatively, call your helper that constructs headers for you. Without headers, the browser renders the payload as literal text. This is a common failure mode. [Elektroda, miszczo997, post #21544649]

Answer

You are likely sending only the body without HTTP headers. Prepend a valid status line and headers, including Content‑Type: text/html. Alternatively, call your helper that constructs headers for you. Without headers, the browser renders the payload as literal text. This is a common failure mode. [Elektroda, miszczo997, post #21544649]

Question 8

Keep using http_send_string(con, HTML_INDEX_PAGE, "text/html"). Point HTML_INDEX_PAGE to your generated content or file‑based buffer. If your helper adds headers, you only supply the body and content type. This keeps your code simple and consistent with your current approach. [Elektroda, zbynio_k, post #21541179]

Answer

Keep using http_send_string(con, HTML_INDEX_PAGE, "text/html"). Point HTML_INDEX_PAGE to your generated content or file‑based buffer. If your helper adds headers, you only supply the body and content type. This keeps your code simple and consistent with your current approach. [Elektroda, zbynio_k, post #21541179]

Question 9

Yes. HTML entities such as " or " render as quotation marks in the browser. They reduce the need to escape characters in C strings. Remember that entities are decoded by HTML, not by your C compiler. Avoid this inside embedded JavaScript strings. “Quotation marks are “"” or “"”.” [Elektroda, fred_onizuka, post #21541395]

Answer

Yes. HTML entities such as " or " render as quotation marks in the browser. They reduce the need to escape characters in C strings. Remember that entities are decoded by HTML, not by your C compiler. Avoid this inside embedded JavaScript strings. “Quotation marks are “"” or “"”.” [Elektroda, fred_onizuka, post #21541395]

Question 10

Place the generated fsdata.c in your httpd app’s source tree. The server uses that in‑flash array as a tiny file system. Requests map to paths within the table and return the corresponding content. The example shows fsdata_custom.c as a working pattern. [Elektroda, miszczo997, post #21541385]

Answer

Place the generated fsdata.c in your httpd app’s source tree. The server uses that in‑flash array as a tiny file system. Requests map to paths within the table and return the corresponding content. The example shows fsdata_custom.c as a working pattern. [Elektroda, miszczo997, post #21541385]

Question 11

Yes. You generate arrays and send them using your server’s send routine. The thread shows an ESP8266 project using http_send_string with a content type, which aligns with this approach. The method is toolchain‑agnostic and fits your current workflow. [Elektroda, zbynio_k, post #21541179]

Answer

Yes. You generate arrays and send them using your server’s send routine. The thread shows an ESP8266 project using http_send_string with a content type, which aligns with this approach. The method is toolchain‑agnostic and fits your current workflow. [Elektroda, zbynio_k, post #21541179]

Question 12

Use const char[] stored in flash and split content across adjacent string literals. Escape quotes as \" and prefer single quotes in HTML attributes to reduce escapes. Keep lines short and avoid macro nesting. Remember a C‑string is characters until the first \0. [Elektroda, JacekCz, post #21541133]

Answer

Use const char[] stored in flash and split content across adjacent string literals. Escape quotes as \" and prefer single quotes in HTML attributes to reduce escapes. Keep lines short and avoid macro nesting. Remember a C‑string is characters until the first \0. [Elektroda, JacekCz, post #21541133]

Question 13

It exists; search within C/C++ Build > Settings. If you cannot find it, generate files manually. Drag your www folder onto makefsdata.exe to produce fsdata.c, then add it to your project and rebuild. This unblocks you immediately. [Elektroda, miszczo997, post #21544649]

Answer

It exists; search within C/C++ Build > Settings. If you cannot find it, generate files manually. Drag your www folder onto makefsdata.exe to produce fsdata.c, then add it to your project and rebuild. This unblocks you immediately. [Elektroda, miszczo997, post #21544649]

Question 14

Put all site files under a www folder before running makefsdata. The tool packages the entire set into fsdata.c, so your server can deliver HTML, JS, and CSS by their paths. This keeps asset handling simple and consistent. [Elektroda, miszczo997, post #21541385]

Answer

Put all site files under a www folder before running makefsdata. The tool packages the entire set into fsdata.c, so your server can deliver HTML, JS, and CSS by their paths. This keeps asset handling simple and consistent. [Elektroda, miszczo997, post #21541385]

ESP01, GCC, Eclipse - how do I conveniently upload extended HTML with multiple quotes?

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